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Finding the Fourth Proportional to 946.70, 1,306.91 and 632.15

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Solution

The fourth proportional to 946.70, 1,306.91 and 632.15 is: 872.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.70 : 1,306.91 = 632.15 : x
  2. Step 2: Convert to fraction form
    946.70/1,306.91 = 632.15/x
  3. Step 3: Cross multiply
    946.70x = 1,306.91 × 632.15
  4. Step 4: Simplify right side
    946.70x = 826,163.16
  5. Step 5: Solve for x
    x = 826,163.16/946.70
  6. Step 6: Final answer
    x = 872.68

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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.