Home / 1,521.10-2,281.20-425.53

Finding the Fourth Proportional to 1,521.10, 2,281.20 and 425.53

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Solution

The fourth proportional to 1,521.10, 2,281.20 and 425.53 is: 638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.10 : 2,281.20 = 425.53 : x
  2. Step 2: Convert to fraction form
    1,521.10/2,281.20 = 425.53/x
  3. Step 3: Cross multiply
    1,521.10x = 2,281.20 × 425.53
  4. Step 4: Simplify right side
    1,521.10x = 970,719.04
  5. Step 5: Solve for x
    x = 970,719.04/1,521.10
  6. Step 6: Final answer
    x = 638.17

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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.