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Finding the Fourth Proportional to 391,333.16, 540,124.24 and 238,421.36

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Solution

The fourth proportional to 391,333.16, 540,124.24 and 238,421.36 is: 329,072.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,333.16 : 540,124.24 = 238,421.36 : x
  2. Step 2: Convert to fraction form
    391,333.16/540,124.24 = 238,421.36/x
  3. Step 3: Cross multiply
    391,333.16x = 540,124.24 × 238,421.36
  4. Step 4: Simplify right side
    391,333.16x = 128,777,155,869.77
  5. Step 5: Solve for x
    x = 128,777,155,869.77/391,333.16
  6. Step 6: Final answer
    x = 329,072.95

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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.