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Finding the Fourth Proportional to 391,854.78, 540,529.94 and 246,429.90

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Solution

The fourth proportional to 391,854.78, 540,529.94 and 246,429.90 is: 339,928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,854.78 : 540,529.94 = 246,429.90 : x
  2. Step 2: Convert to fraction form
    391,854.78/540,529.94 = 246,429.90/x
  3. Step 3: Cross multiply
    391,854.78x = 540,529.94 × 246,429.90
  4. Step 4: Simplify right side
    391,854.78x = 133,202,739,061.21
  5. Step 5: Solve for x
    x = 133,202,739,061.21/391,854.78
  6. Step 6: Final answer
    x = 339,928.84

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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.