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Finding the Fourth Proportional to 860.62, 1,292.01 and 632.20

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Solution

The fourth proportional to 860.62, 1,292.01 and 632.20 is: 949.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.62 : 1,292.01 = 632.20 : x
  2. Step 2: Convert to fraction form
    860.62/1,292.01 = 632.20/x
  3. Step 3: Cross multiply
    860.62x = 1,292.01 × 632.20
  4. Step 4: Simplify right side
    860.62x = 816,808.72
  5. Step 5: Solve for x
    x = 816,808.72/860.62
  6. Step 6: Final answer
    x = 949.09

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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.