Home / 1,126.24-1,689.28-476.80

Finding the Fourth Proportional to 1,126.24, 1,689.28 and 476.80

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Solution

The fourth proportional to 1,126.24, 1,689.28 and 476.80 is: 715.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.24 : 1,689.28 = 476.80 : x
  2. Step 2: Convert to fraction form
    1,126.24/1,689.28 = 476.80/x
  3. Step 3: Cross multiply
    1,126.24x = 1,689.28 × 476.80
  4. Step 4: Simplify right side
    1,126.24x = 805,448.70
  5. Step 5: Solve for x
    x = 805,448.70/1,126.24
  6. Step 6: Final answer
    x = 715.17

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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.