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Finding the Fourth Proportional to 904.32, 1,356.30 and 255.04

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Solution

The fourth proportional to 904.32, 1,356.30 and 255.04 is: 382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.32 : 1,356.30 = 255.04 : x
  2. Step 2: Convert to fraction form
    904.32/1,356.30 = 255.04/x
  3. Step 3: Cross multiply
    904.32x = 1,356.30 × 255.04
  4. Step 4: Simplify right side
    904.32x = 345,910.75
  5. Step 5: Solve for x
    x = 345,910.75/904.32
  6. Step 6: Final answer
    x = 382.51

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Double scale
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1.5x scale

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.