Home / 1,140.21-1,574.18-747.92

Finding the Fourth Proportional to 1,140.21, 1,574.18 and 747.92

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Solution

The fourth proportional to 1,140.21, 1,574.18 and 747.92 is: 1,032.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.21 : 1,574.18 = 747.92 : x
  2. Step 2: Convert to fraction form
    1,140.21/1,574.18 = 747.92/x
  3. Step 3: Cross multiply
    1,140.21x = 1,574.18 × 747.92
  4. Step 4: Simplify right side
    1,140.21x = 1,177,360.90
  5. Step 5: Solve for x
    x = 1,177,360.90/1,140.21
  6. Step 6: Final answer
    x = 1,032.58

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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.