Home / 1,521.12-2,280.42-547.20

Finding the Fourth Proportional to 1,521.12, 2,280.42 and 547.20

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Solution

The fourth proportional to 1,521.12, 2,280.42 and 547.20 is: 820.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.12 : 2,280.42 = 547.20 : x
  2. Step 2: Convert to fraction form
    1,521.12/2,280.42 = 547.20/x
  3. Step 3: Cross multiply
    1,521.12x = 2,280.42 × 547.20
  4. Step 4: Simplify right side
    1,521.12x = 1,247,845.82
  5. Step 5: Solve for x
    x = 1,247,845.82/1,521.12
  6. Step 6: Final answer
    x = 820.35

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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.