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Finding the Fourth Proportional to 488,013.80, 731,048.70 and 429,564.20

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Solution

The fourth proportional to 488,013.80, 731,048.70 and 429,564.20 is: 643,490.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,013.80 : 731,048.70 = 429,564.20 : x
  2. Step 2: Convert to fraction form
    488,013.80/731,048.70 = 429,564.20/x
  3. Step 3: Cross multiply
    488,013.80x = 731,048.70 × 429,564.20
  4. Step 4: Simplify right side
    488,013.80x = 314,032,349,976.54
  5. Step 5: Solve for x
    x = 314,032,349,976.54/488,013.80
  6. Step 6: Final answer
    x = 643,490.72

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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.