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Finding the Fourth Proportional to 528,640.64, 792,954.08 and 129,284.87

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Solution

The fourth proportional to 528,640.64, 792,954.08 and 129,284.87 is: 193,925.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,640.64 : 792,954.08 = 129,284.87 : x
  2. Step 2: Convert to fraction form
    528,640.64/792,954.08 = 129,284.87/x
  3. Step 3: Cross multiply
    528,640.64x = 792,954.08 × 129,284.87
  4. Step 4: Simplify right side
    528,640.64x = 102,516,960,537.58
  5. Step 5: Solve for x
    x = 102,516,960,537.58/528,640.64
  6. Step 6: Final answer
    x = 193,925.62

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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.