Home / 1,417.80-2,128.02-724.95

Finding the Fourth Proportional to 1,417.80, 2,128.02 and 724.95

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Solution

The fourth proportional to 1,417.80, 2,128.02 and 724.95 is: 1,088.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.80 : 2,128.02 = 724.95 : x
  2. Step 2: Convert to fraction form
    1,417.80/2,128.02 = 724.95/x
  3. Step 3: Cross multiply
    1,417.80x = 2,128.02 × 724.95
  4. Step 4: Simplify right side
    1,417.80x = 1,542,708.10
  5. Step 5: Solve for x
    x = 1,542,708.10/1,417.80
  6. Step 6: Final answer
    x = 1,088.10

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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.