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Finding the Fourth Proportional to 718,838.52, 991,954.62 and 396,549.24

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Solution

The fourth proportional to 718,838.52, 991,954.62 and 396,549.24 is: 547,214.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,838.52 : 991,954.62 = 396,549.24 : x
  2. Step 2: Convert to fraction form
    718,838.52/991,954.62 = 396,549.24/x
  3. Step 3: Cross multiply
    718,838.52x = 991,954.62 × 396,549.24
  4. Step 4: Simplify right side
    718,838.52x = 393,358,850,675.49
  5. Step 5: Solve for x
    x = 393,358,850,675.49/718,838.52
  6. Step 6: Final answer
    x = 547,214.49

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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.