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Finding the Fourth Proportional to 372,128.30, 558,019.65 and 161,657.90

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Solution

The fourth proportional to 372,128.30, 558,019.65 and 161,657.90 is: 242,411.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,128.30 : 558,019.65 = 161,657.90 : x
  2. Step 2: Convert to fraction form
    372,128.30/558,019.65 = 161,657.90/x
  3. Step 3: Cross multiply
    372,128.30x = 558,019.65 × 161,657.90
  4. Step 4: Simplify right side
    372,128.30x = 90,208,284,777.74
  5. Step 5: Solve for x
    x = 90,208,284,777.74/372,128.30
  6. Step 6: Final answer
    x = 242,411.78

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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.