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Finding the Fourth Proportional to 528,641.64, 792,955.58 and 129,285.87

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Solution

The fourth proportional to 528,641.64, 792,955.58 and 129,285.87 is: 193,927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,641.64 : 792,955.58 = 129,285.87 : x
  2. Step 2: Convert to fraction form
    528,641.64/792,955.58 = 129,285.87/x
  3. Step 3: Cross multiply
    528,641.64x = 792,955.58 × 129,285.87
  4. Step 4: Simplify right side
    528,641.64x = 102,517,952,031.66
  5. Step 5: Solve for x
    x = 102,517,952,031.66/528,641.64
  6. Step 6: Final answer
    x = 193,927.12

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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.