Home / 925.20-1,276.56-631.08

Finding the Fourth Proportional to 925.20, 1,276.56 and 631.08

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Solution

The fourth proportional to 925.20, 1,276.56 and 631.08 is: 870.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.20 : 1,276.56 = 631.08 : x
  2. Step 2: Convert to fraction form
    925.20/1,276.56 = 631.08/x
  3. Step 3: Cross multiply
    925.20x = 1,276.56 × 631.08
  4. Step 4: Simplify right side
    925.20x = 805,611.48
  5. Step 5: Solve for x
    x = 805,611.48/925.20
  6. Step 6: Final answer
    x = 870.74

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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.