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Finding the Fourth Proportional to 1,119.61, 1,677.70 and 753.04

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Solution

The fourth proportional to 1,119.61, 1,677.70 and 753.04 is: 1,128.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.61 : 1,677.70 = 753.04 : x
  2. Step 2: Convert to fraction form
    1,119.61/1,677.70 = 753.04/x
  3. Step 3: Cross multiply
    1,119.61x = 1,677.70 × 753.04
  4. Step 4: Simplify right side
    1,119.61x = 1,263,375.21
  5. Step 5: Solve for x
    x = 1,263,375.21/1,119.61
  6. Step 6: Final answer
    x = 1,128.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.