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Finding the Fourth Proportional to 761.96, 1,145.18 and 632.79

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Solution

The fourth proportional to 761.96, 1,145.18 and 632.79 is: 951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.96 : 1,145.18 = 632.79 : x
  2. Step 2: Convert to fraction form
    761.96/1,145.18 = 632.79/x
  3. Step 3: Cross multiply
    761.96x = 1,145.18 × 632.79
  4. Step 4: Simplify right side
    761.96x = 724,655.29
  5. Step 5: Solve for x
    x = 724,655.29/761.96
  6. Step 6: Final answer
    x = 951.05

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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.