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Finding the Fourth Proportional to 483,674.88, 725,499.90 and 128,691.90

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Solution

The fourth proportional to 483,674.88, 725,499.90 and 128,691.90 is: 193,034.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,674.88 : 725,499.90 = 128,691.90 : x
  2. Step 2: Convert to fraction form
    483,674.88/725,499.90 = 128,691.90/x
  3. Step 3: Cross multiply
    483,674.88x = 725,499.90 × 128,691.90
  4. Step 4: Simplify right side
    483,674.88x = 93,365,960,580.81
  5. Step 5: Solve for x
    x = 93,365,960,580.81/483,674.88
  6. Step 6: Final answer
    x = 193,034.55

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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.