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Finding the Fourth Proportional to 398,598.67, 597,900.17 and 118,118.35

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Solution

The fourth proportional to 398,598.67, 597,900.17 and 118,118.35 is: 177,178.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,598.67 : 597,900.17 = 118,118.35 : x
  2. Step 2: Convert to fraction form
    398,598.67/597,900.17 = 118,118.35/x
  3. Step 3: Cross multiply
    398,598.67x = 597,900.17 × 118,118.35
  4. Step 4: Simplify right side
    398,598.67x = 70,622,981,545.12
  5. Step 5: Solve for x
    x = 70,622,981,545.12/398,598.67
  6. Step 6: Final answer
    x = 177,178.17

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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.