Home / 1,521.16-2,281.44-425.20

Finding the Fourth Proportional to 1,521.16, 2,281.44 and 425.20

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Solution

The fourth proportional to 1,521.16, 2,281.44 and 425.20 is: 637.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.16 : 2,281.44 = 425.20 : x
  2. Step 2: Convert to fraction form
    1,521.16/2,281.44 = 425.20/x
  3. Step 3: Cross multiply
    1,521.16x = 2,281.44 × 425.20
  4. Step 4: Simplify right side
    1,521.16x = 970,068.29
  5. Step 5: Solve for x
    x = 970,068.29/1,521.16
  6. Step 6: Final answer
    x = 637.72

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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.