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Finding the Fourth Proportional to 394,785.01, 592,115.65 and 128,543.73

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Solution

The fourth proportional to 394,785.01, 592,115.65 and 128,543.73 is: 192,795.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,785.01 : 592,115.65 = 128,543.73 : x
  2. Step 2: Convert to fraction form
    394,785.01/592,115.65 = 128,543.73/x
  3. Step 3: Cross multiply
    394,785.01x = 592,115.65 × 128,543.73
  4. Step 4: Simplify right side
    394,785.01x = 76,112,754,242.37
  5. Step 5: Solve for x
    x = 76,112,754,242.37/394,785.01
  6. Step 6: Final answer
    x = 192,795.45

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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.