Home / 1,399.53-2,086.95-1,387.04

Finding the Fourth Proportional to 1,399.53, 2,086.95 and 1,387.04

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Solution

The fourth proportional to 1,399.53, 2,086.95 and 1,387.04 is: 2,068.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.53 : 2,086.95 = 1,387.04 : x
  2. Step 2: Convert to fraction form
    1,399.53/2,086.95 = 1,387.04/x
  3. Step 3: Cross multiply
    1,399.53x = 2,086.95 × 1,387.04
  4. Step 4: Simplify right side
    1,399.53x = 2,894,674.88
  5. Step 5: Solve for x
    x = 2,894,674.88/1,399.53
  6. Step 6: Final answer
    x = 2,068.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.