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Finding the Fourth Proportional to 974.16, 1,461.25 and 243.75

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Solution

The fourth proportional to 974.16, 1,461.25 and 243.75 is: 365.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.16 : 1,461.25 = 243.75 : x
  2. Step 2: Convert to fraction form
    974.16/1,461.25 = 243.75/x
  3. Step 3: Cross multiply
    974.16x = 1,461.25 × 243.75
  4. Step 4: Simplify right side
    974.16x = 356,179.69
  5. Step 5: Solve for x
    x = 356,179.69/974.16
  6. Step 6: Final answer
    x = 365.63

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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.