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Finding the Fourth Proportional to 1,066.76, 1,472.19 and 641.52

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Solution

The fourth proportional to 1,066.76, 1,472.19 and 641.52 is: 885.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.76 : 1,472.19 = 641.52 : x
  2. Step 2: Convert to fraction form
    1,066.76/1,472.19 = 641.52/x
  3. Step 3: Cross multiply
    1,066.76x = 1,472.19 × 641.52
  4. Step 4: Simplify right side
    1,066.76x = 944,439.33
  5. Step 5: Solve for x
    x = 944,439.33/1,066.76
  6. Step 6: Final answer
    x = 885.33

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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.