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Finding the Fourth Proportional to 386,472.40, 579,679.80 and 161,774.80

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Solution

The fourth proportional to 386,472.40, 579,679.80 and 161,774.80 is: 242,650.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,472.40 : 579,679.80 = 161,774.80 : x
  2. Step 2: Convert to fraction form
    386,472.40/579,679.80 = 161,774.80/x
  3. Step 3: Cross multiply
    386,472.40x = 579,679.80 × 161,774.80
  4. Step 4: Simplify right side
    386,472.40x = 93,777,583,709.04
  5. Step 5: Solve for x
    x = 93,777,583,709.04/386,472.40
  6. Step 6: Final answer
    x = 242,650.14

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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.