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Finding the Fourth Proportional to 391,684.62, 540,620.93 and 238,807.11

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Solution

The fourth proportional to 391,684.62, 540,620.93 and 238,807.11 is: 329,612.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,684.62 : 540,620.93 = 238,807.11 : x
  2. Step 2: Convert to fraction form
    391,684.62/540,620.93 = 238,807.11/x
  3. Step 3: Cross multiply
    391,684.62x = 540,620.93 × 238,807.11
  4. Step 4: Simplify right side
    391,684.62x = 129,104,122,495.83
  5. Step 5: Solve for x
    x = 129,104,122,495.83/391,684.62
  6. Step 6: Final answer
    x = 329,612.44

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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.