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Finding the Fourth Proportional to 298,677.83, 447,945.98 and 85,439.16

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Solution

The fourth proportional to 298,677.83, 447,945.98 and 85,439.16 is: 128,138.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,677.83 : 447,945.98 = 85,439.16 : x
  2. Step 2: Convert to fraction form
    298,677.83/447,945.98 = 85,439.16/x
  3. Step 3: Cross multiply
    298,677.83x = 447,945.98 × 85,439.16
  4. Step 4: Simplify right side
    298,677.83x = 38,272,127,829.38
  5. Step 5: Solve for x
    x = 38,272,127,829.38/298,677.83
  6. Step 6: Final answer
    x = 128,138.50

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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.