Home / 1,126.16-1,686.36-933.20

Finding the Fourth Proportional to 1,126.16, 1,686.36 and 933.20

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Solution

The fourth proportional to 1,126.16, 1,686.36 and 933.20 is: 1,397.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.16 : 1,686.36 = 933.20 : x
  2. Step 2: Convert to fraction form
    1,126.16/1,686.36 = 933.20/x
  3. Step 3: Cross multiply
    1,126.16x = 1,686.36 × 933.20
  4. Step 4: Simplify right side
    1,126.16x = 1,573,711.15
  5. Step 5: Solve for x
    x = 1,573,711.15/1,126.16
  6. Step 6: Final answer
    x = 1,397.41

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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.