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Finding the Fourth Proportional to 472,820.20, 709,691.10 and 236,429.80

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Solution

The fourth proportional to 472,820.20, 709,691.10 and 236,429.80 is: 354,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,820.20 : 709,691.10 = 236,429.80 : x
  2. Step 2: Convert to fraction form
    472,820.20/709,691.10 = 236,429.80/x
  3. Step 3: Cross multiply
    472,820.20x = 709,691.10 × 236,429.80
  4. Step 4: Simplify right side
    472,820.20x = 167,792,124,834.78
  5. Step 5: Solve for x
    x = 167,792,124,834.78/472,820.20
  6. Step 6: Final answer
    x = 354,875.12

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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.