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Finding the Fourth Proportional to 513,043.80, 769,565.70 and 371,326.20

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Solution

The fourth proportional to 513,043.80, 769,565.70 and 371,326.20 is: 556,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,043.80 : 769,565.70 = 371,326.20 : x
  2. Step 2: Convert to fraction form
    513,043.80/769,565.70 = 371,326.20/x
  3. Step 3: Cross multiply
    513,043.80x = 769,565.70 × 371,326.20
  4. Step 4: Simplify right side
    513,043.80x = 285,759,907,031.34
  5. Step 5: Solve for x
    x = 285,759,907,031.34/513,043.80
  6. Step 6: Final answer
    x = 556,989.30

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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.