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Finding the Fourth Proportional to 904.20, 1,246.45 and 717.73

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Solution

The fourth proportional to 904.20, 1,246.45 and 717.73 is: 989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.20 : 1,246.45 = 717.73 : x
  2. Step 2: Convert to fraction form
    904.20/1,246.45 = 717.73/x
  3. Step 3: Cross multiply
    904.20x = 1,246.45 × 717.73
  4. Step 4: Simplify right side
    904.20x = 894,614.56
  5. Step 5: Solve for x
    x = 894,614.56/904.20
  6. Step 6: Final answer
    x = 989.40

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Half scale
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Double scale
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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.