Home / 1,004.80-1,387.26-631.96

Finding the Fourth Proportional to 1,004.80, 1,387.26 and 631.96

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Solution

The fourth proportional to 1,004.80, 1,387.26 and 631.96 is: 872.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.80 : 1,387.26 = 631.96 : x
  2. Step 2: Convert to fraction form
    1,004.80/1,387.26 = 631.96/x
  3. Step 3: Cross multiply
    1,004.80x = 1,387.26 × 631.96
  4. Step 4: Simplify right side
    1,004.80x = 876,692.83
  5. Step 5: Solve for x
    x = 876,692.83/1,004.80
  6. Step 6: Final answer
    x = 872.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.