Home / 1,247.24-1,871.08-425.32

Finding the Fourth Proportional to 1,247.24, 1,871.08 and 425.32

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Solution

The fourth proportional to 1,247.24, 1,871.08 and 425.32 is: 638.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.24 : 1,871.08 = 425.32 : x
  2. Step 2: Convert to fraction form
    1,247.24/1,871.08 = 425.32/x
  3. Step 3: Cross multiply
    1,247.24x = 1,871.08 × 425.32
  4. Step 4: Simplify right side
    1,247.24x = 795,807.75
  5. Step 5: Solve for x
    x = 795,807.75/1,247.24
  6. Step 6: Final answer
    x = 638.06

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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.