Home / 1,517.04-2,275.31-421.11

Finding the Fourth Proportional to 1,517.04, 2,275.31 and 421.11

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Solution

The fourth proportional to 1,517.04, 2,275.31 and 421.11 is: 631.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.04 : 2,275.31 = 421.11 : x
  2. Step 2: Convert to fraction form
    1,517.04/2,275.31 = 421.11/x
  3. Step 3: Cross multiply
    1,517.04x = 2,275.31 × 421.11
  4. Step 4: Simplify right side
    1,517.04x = 958,154.48
  5. Step 5: Solve for x
    x = 958,154.48/1,517.04
  6. Step 6: Final answer
    x = 631.59

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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.