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Finding the Fourth Proportional to 485,117.55, 726,789.60 and 351,666.81

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Solution

The fourth proportional to 485,117.55, 726,789.60 and 351,666.81 is: 526,857.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,117.55 : 726,789.60 = 351,666.81 : x
  2. Step 2: Convert to fraction form
    485,117.55/726,789.60 = 351,666.81/x
  3. Step 3: Cross multiply
    485,117.55x = 726,789.60 × 351,666.81
  4. Step 4: Simplify right side
    485,117.55x = 255,587,780,173.18
  5. Step 5: Solve for x
    x = 255,587,780,173.18/485,117.55
  6. Step 6: Final answer
    x = 526,857.42

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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.