Home / 513,312,205.80-769,968,308.70-398,650,420.20

Finding the Fourth Proportional to 513,312,205.80, 769,968,308.70 and 398,650,420.20

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Solution

The fourth proportional to 513,312,205.80, 769,968,308.70 and 398,650,420.20 is: 597,975,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,312,205.80 : 769,968,308.70 = 398,650,420.20 : x
  2. Step 2: Convert to fraction form
    513,312,205.80/769,968,308.70 = 398,650,420.20/x
  3. Step 3: Cross multiply
    513,312,205.80x = 769,968,308.70 × 398,650,420.20
  4. Step 4: Simplify right side
    513,312,205.80x = 306,948,189,803,938,304
  5. Step 5: Solve for x
    x = 306,948,189,803,938,304/513,312,205.80
  6. Step 6: Final answer
    x = 597,975,630.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.