Home / 1,517.06-2,275.56-421.40

Finding the Fourth Proportional to 1,517.06, 2,275.56 and 421.40

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Solution

The fourth proportional to 1,517.06, 2,275.56 and 421.40 is: 632.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.06 : 2,275.56 = 421.40 : x
  2. Step 2: Convert to fraction form
    1,517.06/2,275.56 = 421.40/x
  3. Step 3: Cross multiply
    1,517.06x = 2,275.56 × 421.40
  4. Step 4: Simplify right side
    1,517.06x = 958,920.98
  5. Step 5: Solve for x
    x = 958,920.98/1,517.06
  6. Step 6: Final answer
    x = 632.09

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1.5x scale

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.