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Finding the Fourth Proportional to 982.08, 1,354.68 and 632.64

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Solution

The fourth proportional to 982.08, 1,354.68 and 632.64 is: 872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.08 : 1,354.68 = 632.64 : x
  2. Step 2: Convert to fraction form
    982.08/1,354.68 = 632.64/x
  3. Step 3: Cross multiply
    982.08x = 1,354.68 × 632.64
  4. Step 4: Simplify right side
    982.08x = 857,024.76
  5. Step 5: Solve for x
    x = 857,024.76/982.08
  6. Step 6: Final answer
    x = 872.66

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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.