Home / 1,247.46-1,870.85-425.28

Finding the Fourth Proportional to 1,247.46, 1,870.85 and 425.28

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Solution

The fourth proportional to 1,247.46, 1,870.85 and 425.28 is: 637.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.46 : 1,870.85 = 425.28 : x
  2. Step 2: Convert to fraction form
    1,247.46/1,870.85 = 425.28/x
  3. Step 3: Cross multiply
    1,247.46x = 1,870.85 × 425.28
  4. Step 4: Simplify right side
    1,247.46x = 795,632.96
  5. Step 5: Solve for x
    x = 795,632.96/1,247.46
  6. Step 6: Final answer
    x = 637.80

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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.