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Finding the Fourth Proportional to 379,391.61, 569,025.45 and 126,661.89

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Solution

The fourth proportional to 379,391.61, 569,025.45 and 126,661.89 is: 189,972.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,391.61 : 569,025.45 = 126,661.89 : x
  2. Step 2: Convert to fraction form
    379,391.61/569,025.45 = 126,661.89/x
  3. Step 3: Cross multiply
    379,391.61x = 569,025.45 × 126,661.89
  4. Step 4: Simplify right side
    379,391.61x = 72,073,838,955.10
  5. Step 5: Solve for x
    x = 72,073,838,955.10/379,391.61
  6. Step 6: Final answer
    x = 189,972.15

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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.