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Finding the Fourth Proportional to 2,280.66, 3,421.08 and 981.24

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Solution

The fourth proportional to 2,280.66, 3,421.08 and 981.24 is: 1,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.66 : 3,421.08 = 981.24 : x
  2. Step 2: Convert to fraction form
    2,280.66/3,421.08 = 981.24/x
  3. Step 3: Cross multiply
    2,280.66x = 3,421.08 × 981.24
  4. Step 4: Simplify right side
    2,280.66x = 3,356,900.54
  5. Step 5: Solve for x
    x = 3,356,900.54/2,280.66
  6. Step 6: Final answer
    x = 1,471.90

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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.