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Finding the Fourth Proportional to 398,712.96, 597,872.52 and 145,802.79

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Solution

The fourth proportional to 398,712.96, 597,872.52 and 145,802.79 is: 218,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,712.96 : 597,872.52 = 145,802.79 : x
  2. Step 2: Convert to fraction form
    398,712.96/597,872.52 = 145,802.79/x
  3. Step 3: Cross multiply
    398,712.96x = 597,872.52 × 145,802.79
  4. Step 4: Simplify right side
    398,712.96x = 87,171,481,480.33
  5. Step 5: Solve for x
    x = 87,171,481,480.33/398,712.96
  6. Step 6: Final answer
    x = 218,632.17

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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.