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Finding the Fourth Proportional to 391,043.52, 539,884.64 and 268,746.56

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Solution

The fourth proportional to 391,043.52, 539,884.64 and 268,746.56 is: 371,038.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,043.52 : 539,884.64 = 268,746.56 : x
  2. Step 2: Convert to fraction form
    391,043.52/539,884.64 = 268,746.56/x
  3. Step 3: Cross multiply
    391,043.52x = 539,884.64 × 268,746.56
  4. Step 4: Simplify right side
    391,043.52x = 145,092,139,796.84
  5. Step 5: Solve for x
    x = 145,092,139,796.84/391,043.52
  6. Step 6: Final answer
    x = 371,038.34

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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.