Home / 1,140.19-1,708.75-749.61

Finding the Fourth Proportional to 1,140.19, 1,708.75 and 749.61

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Solution

The fourth proportional to 1,140.19, 1,708.75 and 749.61 is: 1,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.19 : 1,708.75 = 749.61 : x
  2. Step 2: Convert to fraction form
    1,140.19/1,708.75 = 749.61/x
  3. Step 3: Cross multiply
    1,140.19x = 1,708.75 × 749.61
  4. Step 4: Simplify right side
    1,140.19x = 1,280,897.02
  5. Step 5: Solve for x
    x = 1,280,897.02/1,140.19
  6. Step 6: Final answer
    x = 1,123.40

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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.