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Finding the Fourth Proportional to 3,280.96, 4,921.44 and 974.08

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Solution

The fourth proportional to 3,280.96, 4,921.44 and 974.08 is: 1,461.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.96 : 4,921.44 = 974.08 : x
  2. Step 2: Convert to fraction form
    3,280.96/4,921.44 = 974.08/x
  3. Step 3: Cross multiply
    3,280.96x = 4,921.44 × 974.08
  4. Step 4: Simplify right side
    3,280.96x = 4,793,876.28
  5. Step 5: Solve for x
    x = 4,793,876.28/3,280.96
  6. Step 6: Final answer
    x = 1,461.12

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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.