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Finding the Fourth Proportional to 641,686.32, 963,475.72 and 357,931.28

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Solution

The fourth proportional to 641,686.32, 963,475.72 and 357,931.28 is: 537,424.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,686.32 : 963,475.72 = 357,931.28 : x
  2. Step 2: Convert to fraction form
    641,686.32/963,475.72 = 357,931.28/x
  3. Step 3: Cross multiply
    641,686.32x = 963,475.72 × 357,931.28
  4. Step 4: Simplify right side
    641,686.32x = 344,858,097,708.52
  5. Step 5: Solve for x
    x = 344,858,097,708.52/641,686.32
  6. Step 6: Final answer
    x = 537,424.73

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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.