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Finding the Fourth Proportional to 488,427.80, 731,669.70 and 429,978.20

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Solution

The fourth proportional to 488,427.80, 731,669.70 and 429,978.20 is: 644,111.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,427.80 : 731,669.70 = 429,978.20 : x
  2. Step 2: Convert to fraction form
    488,427.80/731,669.70 = 429,978.20/x
  3. Step 3: Cross multiply
    488,427.80x = 731,669.70 × 429,978.20
  4. Step 4: Simplify right side
    488,427.80x = 314,602,020,600.54
  5. Step 5: Solve for x
    x = 314,602,020,600.54/488,427.80
  6. Step 6: Final answer
    x = 644,111.62

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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.