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Finding the Fourth Proportional to 386,472.33, 579,712.22 and 146,521.70

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Solution

The fourth proportional to 386,472.33, 579,712.22 and 146,521.70 is: 219,783.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,472.33 : 579,712.22 = 146,521.70 : x
  2. Step 2: Convert to fraction form
    386,472.33/579,712.22 = 146,521.70/x
  3. Step 3: Cross multiply
    386,472.33x = 579,712.22 × 146,521.70
  4. Step 4: Simplify right side
    386,472.33x = 84,940,419,985.17
  5. Step 5: Solve for x
    x = 84,940,419,985.17/386,472.33
  6. Step 6: Final answer
    x = 219,783.96

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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.