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Finding the Fourth Proportional to 1,128.99, 1,559.97 and 932.16

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Solution

The fourth proportional to 1,128.99, 1,559.97 and 932.16 is: 1,288.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.99 : 1,559.97 = 932.16 : x
  2. Step 2: Convert to fraction form
    1,128.99/1,559.97 = 932.16/x
  3. Step 3: Cross multiply
    1,128.99x = 1,559.97 × 932.16
  4. Step 4: Simplify right side
    1,128.99x = 1,454,141.64
  5. Step 5: Solve for x
    x = 1,454,141.64/1,128.99
  6. Step 6: Final answer
    x = 1,288.00

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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.