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Finding the Fourth Proportional to 625,643.20, 938,464.80 and 310,715.20

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Solution

The fourth proportional to 625,643.20, 938,464.80 and 310,715.20 is: 466,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,643.20 : 938,464.80 = 310,715.20 : x
  2. Step 2: Convert to fraction form
    625,643.20/938,464.80 = 310,715.20/x
  3. Step 3: Cross multiply
    625,643.20x = 938,464.80 × 310,715.20
  4. Step 4: Simplify right side
    625,643.20x = 291,595,278,024.96
  5. Step 5: Solve for x
    x = 291,595,278,024.96/625,643.20
  6. Step 6: Final answer
    x = 466,072.80

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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.