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Finding the Fourth Proportional to 925.90, 1,276.26 and 627.05

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Solution

The fourth proportional to 925.90, 1,276.26 and 627.05 is: 864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.90 : 1,276.26 = 627.05 : x
  2. Step 2: Convert to fraction form
    925.90/1,276.26 = 627.05/x
  3. Step 3: Cross multiply
    925.90x = 1,276.26 × 627.05
  4. Step 4: Simplify right side
    925.90x = 800,279.67
  5. Step 5: Solve for x
    x = 800,279.67/925.90
  6. Step 6: Final answer
    x = 864.33

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1.5x scale

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.