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Finding the Fourth Proportional to 518,877.60, 778,316.40 and 430,304.10

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Solution

The fourth proportional to 518,877.60, 778,316.40 and 430,304.10 is: 645,456.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,877.60 : 778,316.40 = 430,304.10 : x
  2. Step 2: Convert to fraction form
    518,877.60/778,316.40 = 430,304.10/x
  3. Step 3: Cross multiply
    518,877.60x = 778,316.40 × 430,304.10
  4. Step 4: Simplify right side
    518,877.60x = 334,912,738,017.24
  5. Step 5: Solve for x
    x = 334,912,738,017.24/518,877.60
  6. Step 6: Final answer
    x = 645,456.15

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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.