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Finding the Fourth Proportional to 875.17, 1,310.04 and 654.50

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Solution

The fourth proportional to 875.17, 1,310.04 and 654.50 is: 979.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.17 : 1,310.04 = 654.50 : x
  2. Step 2: Convert to fraction form
    875.17/1,310.04 = 654.50/x
  3. Step 3: Cross multiply
    875.17x = 1,310.04 × 654.50
  4. Step 4: Simplify right side
    875.17x = 857,414.63
  5. Step 5: Solve for x
    x = 857,414.63/875.17
  6. Step 6: Final answer
    x = 979.71

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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.