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Finding the Fourth Proportional to 372,915.89, 559,861.66 and 221,389.59

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Solution

The fourth proportional to 372,915.89, 559,861.66 and 221,389.59 is: 332,373.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,915.89 : 559,861.66 = 221,389.59 : x
  2. Step 2: Convert to fraction form
    372,915.89/559,861.66 = 221,389.59/x
  3. Step 3: Cross multiply
    372,915.89x = 559,861.66 × 221,389.59
  4. Step 4: Simplify right side
    372,915.89x = 123,947,543,364.12
  5. Step 5: Solve for x
    x = 123,947,543,364.12/372,915.89
  6. Step 6: Final answer
    x = 332,373.99

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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.