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Finding the Fourth Proportional to 656.43, 983.72 and 493.92

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Solution

The fourth proportional to 656.43, 983.72 and 493.92 is: 740.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.43 : 983.72 = 493.92 : x
  2. Step 2: Convert to fraction form
    656.43/983.72 = 493.92/x
  3. Step 3: Cross multiply
    656.43x = 983.72 × 493.92
  4. Step 4: Simplify right side
    656.43x = 485,878.98
  5. Step 5: Solve for x
    x = 485,878.98/656.43
  6. Step 6: Final answer
    x = 740.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.