Home / 1,440.28-1,988.49-1,142.74

Finding the Fourth Proportional to 1,440.28, 1,988.49 and 1,142.74

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Solution

The fourth proportional to 1,440.28, 1,988.49 and 1,142.74 is: 1,577.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.28 : 1,988.49 = 1,142.74 : x
  2. Step 2: Convert to fraction form
    1,440.28/1,988.49 = 1,142.74/x
  3. Step 3: Cross multiply
    1,440.28x = 1,988.49 × 1,142.74
  4. Step 4: Simplify right side
    1,440.28x = 2,272,327.06
  5. Step 5: Solve for x
    x = 2,272,327.06/1,440.28
  6. Step 6: Final answer
    x = 1,577.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.