Home / 1,247.35-1,872.22-631.57

Finding the Fourth Proportional to 1,247.35, 1,872.22 and 631.57

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Solution

The fourth proportional to 1,247.35, 1,872.22 and 631.57 is: 947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.35 : 1,872.22 = 631.57 : x
  2. Step 2: Convert to fraction form
    1,247.35/1,872.22 = 631.57/x
  3. Step 3: Cross multiply
    1,247.35x = 1,872.22 × 631.57
  4. Step 4: Simplify right side
    1,247.35x = 1,182,437.99
  5. Step 5: Solve for x
    x = 1,182,437.99/1,247.35
  6. Step 6: Final answer
    x = 947.96

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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.