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Finding the Fourth Proportional to 910.32, 1,255.44 and 723.60

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Solution

The fourth proportional to 910.32, 1,255.44 and 723.60 is: 997.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.32 : 1,255.44 = 723.60 : x
  2. Step 2: Convert to fraction form
    910.32/1,255.44 = 723.60/x
  3. Step 3: Cross multiply
    910.32x = 1,255.44 × 723.60
  4. Step 4: Simplify right side
    910.32x = 908,436.38
  5. Step 5: Solve for x
    x = 908,436.38/910.32
  6. Step 6: Final answer
    x = 997.93

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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.