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Finding the Fourth Proportional to 345,710.40, 518,565.60 and 324,715.20

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Solution

The fourth proportional to 345,710.40, 518,565.60 and 324,715.20 is: 487,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,710.40 : 518,565.60 = 324,715.20 : x
  2. Step 2: Convert to fraction form
    345,710.40/518,565.60 = 324,715.20/x
  3. Step 3: Cross multiply
    345,710.40x = 518,565.60 × 324,715.20
  4. Step 4: Simplify right side
    345,710.40x = 168,386,132,517.12
  5. Step 5: Solve for x
    x = 168,386,132,517.12/345,710.40
  6. Step 6: Final answer
    x = 487,072.80

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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.