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Finding the Fourth Proportional to 635,815.20, 953,722.80 and 280,646.40

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Solution

The fourth proportional to 635,815.20, 953,722.80 and 280,646.40 is: 420,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,815.20 : 953,722.80 = 280,646.40 : x
  2. Step 2: Convert to fraction form
    635,815.20/953,722.80 = 280,646.40/x
  3. Step 3: Cross multiply
    635,815.20x = 953,722.80 × 280,646.40
  4. Step 4: Simplify right side
    635,815.20x = 267,658,870,417.92
  5. Step 5: Solve for x
    x = 267,658,870,417.92/635,815.20
  6. Step 6: Final answer
    x = 420,969.60

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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.