Home / 1,272.32-1,909.68-623.52

Finding the Fourth Proportional to 1,272.32, 1,909.68 and 623.52

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Solution

The fourth proportional to 1,272.32, 1,909.68 and 623.52 is: 935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.32 : 1,909.68 = 623.52 : x
  2. Step 2: Convert to fraction form
    1,272.32/1,909.68 = 623.52/x
  3. Step 3: Cross multiply
    1,272.32x = 1,909.68 × 623.52
  4. Step 4: Simplify right side
    1,272.32x = 1,190,723.67
  5. Step 5: Solve for x
    x = 1,190,723.67/1,272.32
  6. Step 6: Final answer
    x = 935.87

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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.