Home / 1,356.17-2,031.29-807.14

Finding the Fourth Proportional to 1,356.17, 2,031.29 and 807.14

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Solution

The fourth proportional to 1,356.17, 2,031.29 and 807.14 is: 1,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.17 : 2,031.29 = 807.14 : x
  2. Step 2: Convert to fraction form
    1,356.17/2,031.29 = 807.14/x
  3. Step 3: Cross multiply
    1,356.17x = 2,031.29 × 807.14
  4. Step 4: Simplify right side
    1,356.17x = 1,639,535.41
  5. Step 5: Solve for x
    x = 1,639,535.41/1,356.17
  6. Step 6: Final answer
    x = 1,208.95

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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.