Home / 1,421.52-2,119.88-1,264.20

Finding the Fourth Proportional to 1,421.52, 2,119.88 and 1,264.20

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Solution

The fourth proportional to 1,421.52, 2,119.88 and 1,264.20 is: 1,885.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.52 : 2,119.88 = 1,264.20 : x
  2. Step 2: Convert to fraction form
    1,421.52/2,119.88 = 1,264.20/x
  3. Step 3: Cross multiply
    1,421.52x = 2,119.88 × 1,264.20
  4. Step 4: Simplify right side
    1,421.52x = 2,679,952.30
  5. Step 5: Solve for x
    x = 2,679,952.30/1,421.52
  6. Step 6: Final answer
    x = 1,885.27

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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.