Home / 1,247.27-1,870.45-425.32

Finding the Fourth Proportional to 1,247.27, 1,870.45 and 425.32

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Solution

The fourth proportional to 1,247.27, 1,870.45 and 425.32 is: 637.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.27 : 1,870.45 = 425.32 : x
  2. Step 2: Convert to fraction form
    1,247.27/1,870.45 = 425.32/x
  3. Step 3: Cross multiply
    1,247.27x = 1,870.45 × 425.32
  4. Step 4: Simplify right side
    1,247.27x = 795,534.05
  5. Step 5: Solve for x
    x = 795,534.05/1,247.27
  6. Step 6: Final answer
    x = 637.82

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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.