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Finding the Fourth Proportional to 391,915.48, 540,802 and 230,760.04

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Solution

The fourth proportional to 391,915.48, 540,802 and 230,760.04 is: 318,424.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,915.48 : 540,802 = 230,760.04 : x
  2. Step 2: Convert to fraction form
    391,915.48/540,802 = 230,760.04/x
  3. Step 3: Cross multiply
    391,915.48x = 540,802 × 230,760.04
  4. Step 4: Simplify right side
    391,915.48x = 124,795,491,152.08
  5. Step 5: Solve for x
    x = 124,795,491,152.08/391,915.48
  6. Step 6: Final answer
    x = 318,424.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.