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Finding the Fourth Proportional to 528,639.64, 792,952.58 and 129,283.87

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Solution

The fourth proportional to 528,639.64, 792,952.58 and 129,283.87 is: 193,924.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,639.64 : 792,952.58 = 129,283.87 : x
  2. Step 2: Convert to fraction form
    528,639.64/792,952.58 = 129,283.87/x
  3. Step 3: Cross multiply
    528,639.64x = 792,952.58 × 129,283.87
  4. Step 4: Simplify right side
    528,639.64x = 102,515,974,304.12
  5. Step 5: Solve for x
    x = 102,515,974,304.12/528,639.64
  6. Step 6: Final answer
    x = 193,924.12

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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.