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Finding the Fourth Proportional to 869,473.71, 1,304,085.89 and 420,073.90

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Solution

The fourth proportional to 869,473.71, 1,304,085.89 and 420,073.90 is: 630,050.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,473.71 : 1,304,085.89 = 420,073.90 : x
  2. Step 2: Convert to fraction form
    869,473.71/1,304,085.89 = 420,073.90/x
  3. Step 3: Cross multiply
    869,473.71x = 1,304,085.89 × 420,073.90
  4. Step 4: Simplify right side
    869,473.71x = 547,812,443,537.24
  5. Step 5: Solve for x
    x = 547,812,443,537.24/869,473.71
  6. Step 6: Final answer
    x = 630,050.61

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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.