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Finding the Fourth Proportional to 652,318.60, 978,477.90 and 439,742.20

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Solution

The fourth proportional to 652,318.60, 978,477.90 and 439,742.20 is: 659,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,318.60 : 978,477.90 = 439,742.20 : x
  2. Step 2: Convert to fraction form
    652,318.60/978,477.90 = 439,742.20/x
  3. Step 3: Cross multiply
    652,318.60x = 978,477.90 × 439,742.20
  4. Step 4: Simplify right side
    652,318.60x = 430,278,024,397.38
  5. Step 5: Solve for x
    x = 430,278,024,397.38/652,318.60
  6. Step 6: Final answer
    x = 659,613.30

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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.