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Finding the Fourth Proportional to 435,159.87, 649,761.69 and 389,888.97

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Solution

The fourth proportional to 435,159.87, 649,761.69 and 389,888.97 is: 582,165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,159.87 : 649,761.69 = 389,888.97 : x
  2. Step 2: Convert to fraction form
    435,159.87/649,761.69 = 389,888.97/x
  3. Step 3: Cross multiply
    435,159.87x = 649,761.69 × 389,888.97
  4. Step 4: Simplify right side
    435,159.87x = 253,334,916,059.56
  5. Step 5: Solve for x
    x = 253,334,916,059.56/435,159.87
  6. Step 6: Final answer
    x = 582,165.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.