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Finding the Fourth Proportional to 490,043.52, 675,747.36 and 387,905.76

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Solution

The fourth proportional to 490,043.52, 675,747.36 and 387,905.76 is: 534,904.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,043.52 : 675,747.36 = 387,905.76 : x
  2. Step 2: Convert to fraction form
    490,043.52/675,747.36 = 387,905.76/x
  3. Step 3: Cross multiply
    490,043.52x = 675,747.36 × 387,905.76
  4. Step 4: Simplify right side
    490,043.52x = 262,126,293,248.79
  5. Step 5: Solve for x
    x = 262,126,293,248.79/490,043.52
  6. Step 6: Final answer
    x = 534,904.11

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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.