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Finding the Fourth Proportional to 483,674.38, 725,499.15 and 128,691.40

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Solution

The fourth proportional to 483,674.38, 725,499.15 and 128,691.40 is: 193,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,674.38 : 725,499.15 = 128,691.40 : x
  2. Step 2: Convert to fraction form
    483,674.38/725,499.15 = 128,691.40/x
  3. Step 3: Cross multiply
    483,674.38x = 725,499.15 × 128,691.40
  4. Step 4: Simplify right side
    483,674.38x = 93,365,501,312.31
  5. Step 5: Solve for x
    x = 93,365,501,312.31/483,674.38
  6. Step 6: Final answer
    x = 193,033.80

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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.