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Finding the Fourth Proportional to 875.08, 1,306.46 and 668.56

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Solution

The fourth proportional to 875.08, 1,306.46 and 668.56 is: 998.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.08 : 1,306.46 = 668.56 : x
  2. Step 2: Convert to fraction form
    875.08/1,306.46 = 668.56/x
  3. Step 3: Cross multiply
    875.08x = 1,306.46 × 668.56
  4. Step 4: Simplify right side
    875.08x = 873,446.90
  5. Step 5: Solve for x
    x = 873,446.90/875.08
  6. Step 6: Final answer
    x = 998.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.