Home / 1,517.03-2,275.53-421.39

Finding the Fourth Proportional to 1,517.03, 2,275.53 and 421.39

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Solution

The fourth proportional to 1,517.03, 2,275.53 and 421.39 is: 632.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.03 : 2,275.53 = 421.39 : x
  2. Step 2: Convert to fraction form
    1,517.03/2,275.53 = 421.39/x
  3. Step 3: Cross multiply
    1,517.03x = 2,275.53 × 421.39
  4. Step 4: Simplify right side
    1,517.03x = 958,879.90
  5. Step 5: Solve for x
    x = 958,879.90/1,517.03
  6. Step 6: Final answer
    x = 632.08

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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.