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Finding the Fourth Proportional to 904.57, 1,356.86 and 220.57

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Solution

The fourth proportional to 904.57, 1,356.86 and 220.57 is: 330.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.57 : 1,356.86 = 220.57 : x
  2. Step 2: Convert to fraction form
    904.57/1,356.86 = 220.57/x
  3. Step 3: Cross multiply
    904.57x = 1,356.86 × 220.57
  4. Step 4: Simplify right side
    904.57x = 299,282.61
  5. Step 5: Solve for x
    x = 299,282.61/904.57
  6. Step 6: Final answer
    x = 330.86

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Double scale
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Similar ratio
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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.