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Finding the Fourth Proportional to 873.20, 1,204.97 and 480.19

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Solution

The fourth proportional to 873.20, 1,204.97 and 480.19 is: 662.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.20 : 1,204.97 = 480.19 : x
  2. Step 2: Convert to fraction form
    873.20/1,204.97 = 480.19/x
  3. Step 3: Cross multiply
    873.20x = 1,204.97 × 480.19
  4. Step 4: Simplify right side
    873.20x = 578,614.54
  5. Step 5: Solve for x
    x = 578,614.54/873.20
  6. Step 6: Final answer
    x = 662.64

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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.