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Finding the Fourth Proportional to 386,444.30, 579,666.45 and 161,765.90

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Solution

The fourth proportional to 386,444.30, 579,666.45 and 161,765.90 is: 242,648.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,444.30 : 579,666.45 = 161,765.90 : x
  2. Step 2: Convert to fraction form
    386,444.30/579,666.45 = 161,765.90/x
  3. Step 3: Cross multiply
    386,444.30x = 579,666.45 × 161,765.90
  4. Step 4: Simplify right side
    386,444.30x = 93,770,264,984.06
  5. Step 5: Solve for x
    x = 93,770,264,984.06/386,444.30
  6. Step 6: Final answer
    x = 242,648.85

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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.