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Finding the Fourth Proportional to 691.07, 1,035.72 and 446.85

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Solution

The fourth proportional to 691.07, 1,035.72 and 446.85 is: 669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.07 : 1,035.72 = 446.85 : x
  2. Step 2: Convert to fraction form
    691.07/1,035.72 = 446.85/x
  3. Step 3: Cross multiply
    691.07x = 1,035.72 × 446.85
  4. Step 4: Simplify right side
    691.07x = 462,811.48
  5. Step 5: Solve for x
    x = 462,811.48/691.07
  6. Step 6: Final answer
    x = 669.71

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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.