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Finding the Fourth Proportional to 386,389.98, 579,472.65 and 149,679.90

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Solution

The fourth proportional to 386,389.98, 579,472.65 and 149,679.90 is: 224,476.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,389.98 : 579,472.65 = 149,679.90 : x
  2. Step 2: Convert to fraction form
    386,389.98/579,472.65 = 149,679.90/x
  3. Step 3: Cross multiply
    386,389.98x = 579,472.65 × 149,679.90
  4. Step 4: Simplify right side
    386,389.98x = 86,735,408,304.74
  5. Step 5: Solve for x
    x = 86,735,408,304.74/386,389.98
  6. Step 6: Final answer
    x = 224,476.34

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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.