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Finding the Fourth Proportional to 732.48, 1,008.80 and 690.24

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Solution

The fourth proportional to 732.48, 1,008.80 and 690.24 is: 950.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.48 : 1,008.80 = 690.24 : x
  2. Step 2: Convert to fraction form
    732.48/1,008.80 = 690.24/x
  3. Step 3: Cross multiply
    732.48x = 1,008.80 × 690.24
  4. Step 4: Simplify right side
    732.48x = 696,314.11
  5. Step 5: Solve for x
    x = 696,314.11/732.48
  6. Step 6: Final answer
    x = 950.63

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1.5x scale

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.