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Finding the Fourth Proportional to 656,269.20, 983,820.60 and 431,737.20

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Solution

The fourth proportional to 656,269.20, 983,820.60 and 431,737.20 is: 647,222.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,269.20 : 983,820.60 = 431,737.20 : x
  2. Step 2: Convert to fraction form
    656,269.20/983,820.60 = 431,737.20/x
  3. Step 3: Cross multiply
    656,269.20x = 983,820.60 × 431,737.20
  4. Step 4: Simplify right side
    656,269.20x = 424,751,951,146.32
  5. Step 5: Solve for x
    x = 424,751,951,146.32/656,269.20
  6. Step 6: Final answer
    x = 647,222.13

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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.