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Finding the Fourth Proportional to 1,122.09, 1,549.12 and 750.30

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Solution

The fourth proportional to 1,122.09, 1,549.12 and 750.30 is: 1,035.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.09 : 1,549.12 = 750.30 : x
  2. Step 2: Convert to fraction form
    1,122.09/1,549.12 = 750.30/x
  3. Step 3: Cross multiply
    1,122.09x = 1,549.12 × 750.30
  4. Step 4: Simplify right side
    1,122.09x = 1,162,304.74
  5. Step 5: Solve for x
    x = 1,162,304.74/1,122.09
  6. Step 6: Final answer
    x = 1,035.84

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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.