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Finding the Fourth Proportional to 761.68, 1,051.13 and 446.88

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Solution

The fourth proportional to 761.68, 1,051.13 and 446.88 is: 616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.68 : 1,051.13 = 446.88 : x
  2. Step 2: Convert to fraction form
    761.68/1,051.13 = 446.88/x
  3. Step 3: Cross multiply
    761.68x = 1,051.13 × 446.88
  4. Step 4: Simplify right side
    761.68x = 469,728.97
  5. Step 5: Solve for x
    x = 469,728.97/761.68
  6. Step 6: Final answer
    x = 616.70

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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.