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Finding the Fourth Proportional to 391,768.72, 540,752.96 and 230,717.20

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Solution

The fourth proportional to 391,768.72, 540,752.96 and 230,717.20 is: 318,455.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,768.72 : 540,752.96 = 230,717.20 : x
  2. Step 2: Convert to fraction form
    391,768.72/540,752.96 = 230,717.20/x
  3. Step 3: Cross multiply
    391,768.72x = 540,752.96 × 230,717.20
  4. Step 4: Simplify right side
    391,768.72x = 124,761,008,822.91
  5. Step 5: Solve for x
    x = 124,761,008,822.91/391,768.72
  6. Step 6: Final answer
    x = 318,455.77

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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.