Home / 1,251.06-1,876.80-429.18

Finding the Fourth Proportional to 1,251.06, 1,876.80 and 429.18

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Solution

The fourth proportional to 1,251.06, 1,876.80 and 429.18 is: 643.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.06 : 1,876.80 = 429.18 : x
  2. Step 2: Convert to fraction form
    1,251.06/1,876.80 = 429.18/x
  3. Step 3: Cross multiply
    1,251.06x = 1,876.80 × 429.18
  4. Step 4: Simplify right side
    1,251.06x = 805,485.02
  5. Step 5: Solve for x
    x = 805,485.02/1,251.06
  6. Step 6: Final answer
    x = 643.84

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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.