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Finding the Fourth Proportional to 391,693.37, 540,488.50 and 238,675.82

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Solution

The fourth proportional to 391,693.37, 540,488.50 and 238,675.82 is: 329,343.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,693.37 : 540,488.50 = 238,675.82 : x
  2. Step 2: Convert to fraction form
    391,693.37/540,488.50 = 238,675.82/x
  3. Step 3: Cross multiply
    391,693.37x = 540,488.50 × 238,675.82
  4. Step 4: Simplify right side
    391,693.37x = 129,001,532,638.94
  5. Step 5: Solve for x
    x = 129,001,532,638.94/391,693.37
  6. Step 6: Final answer
    x = 329,343.16

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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.