Home / 1,521.66-2,282.19-425.70

Finding the Fourth Proportional to 1,521.66, 2,282.19 and 425.70

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Solution

The fourth proportional to 1,521.66, 2,282.19 and 425.70 is: 638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.66 : 2,282.19 = 425.70 : x
  2. Step 2: Convert to fraction form
    1,521.66/2,282.19 = 425.70/x
  3. Step 3: Cross multiply
    1,521.66x = 2,282.19 × 425.70
  4. Step 4: Simplify right side
    1,521.66x = 971,528.28
  5. Step 5: Solve for x
    x = 971,528.28/1,521.66
  6. Step 6: Final answer
    x = 638.47

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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.