Home / 1,681.32-2,517.86-1,387.02

Finding the Fourth Proportional to 1,681.32, 2,517.86 and 1,387.02

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Solution

The fourth proportional to 1,681.32, 2,517.86 and 1,387.02 is: 2,077.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.32 : 2,517.86 = 1,387.02 : x
  2. Step 2: Convert to fraction form
    1,681.32/2,517.86 = 1,387.02/x
  3. Step 3: Cross multiply
    1,681.32x = 2,517.86 × 1,387.02
  4. Step 4: Simplify right side
    1,681.32x = 3,492,315.24
  5. Step 5: Solve for x
    x = 3,492,315.24/1,681.32
  6. Step 6: Final answer
    x = 2,077.13

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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.