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Finding the Fourth Proportional to 1,682.40, 2,521.92 and 803.28

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Solution

The fourth proportional to 1,682.40, 2,521.92 and 803.28 is: 1,204.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,682.40 : 2,521.92 = 803.28 : x
  2. Step 2: Convert to fraction form
    1,682.40/2,521.92 = 803.28/x
  3. Step 3: Cross multiply
    1,682.40x = 2,521.92 × 803.28
  4. Step 4: Simplify right side
    1,682.40x = 2,025,807.90
  5. Step 5: Solve for x
    x = 2,025,807.90/1,682.40
  6. Step 6: Final answer
    x = 1,204.12

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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.