Home / 1,127.25-1,689.39-477.18

Finding the Fourth Proportional to 1,127.25, 1,689.39 and 477.18

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Solution

The fourth proportional to 1,127.25, 1,689.39 and 477.18 is: 715.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.25 : 1,689.39 = 477.18 : x
  2. Step 2: Convert to fraction form
    1,127.25/1,689.39 = 477.18/x
  3. Step 3: Cross multiply
    1,127.25x = 1,689.39 × 477.18
  4. Step 4: Simplify right side
    1,127.25x = 806,143.12
  5. Step 5: Solve for x
    x = 806,143.12/1,127.25
  6. Step 6: Final answer
    x = 715.14

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Double scale
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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.