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Finding the Fourth Proportional to 1,134.88, 1,566 and 669.12

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Solution

The fourth proportional to 1,134.88, 1,566 and 669.12 is: 923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.88 : 1,566 = 669.12 : x
  2. Step 2: Convert to fraction form
    1,134.88/1,566 = 669.12/x
  3. Step 3: Cross multiply
    1,134.88x = 1,566 × 669.12
  4. Step 4: Simplify right side
    1,134.88x = 1,047,841.92
  5. Step 5: Solve for x
    x = 1,047,841.92/1,134.88
  6. Step 6: Final answer
    x = 923.31

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Double scale
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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.