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Finding the Fourth Proportional to 1,661.32, 2,491.98 and 1,010.80

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Solution

The fourth proportional to 1,661.32, 2,491.98 and 1,010.80 is: 1,516.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.32 : 2,491.98 = 1,010.80 : x
  2. Step 2: Convert to fraction form
    1,661.32/2,491.98 = 1,010.80/x
  3. Step 3: Cross multiply
    1,661.32x = 2,491.98 × 1,010.80
  4. Step 4: Simplify right side
    1,661.32x = 2,518,893.38
  5. Step 5: Solve for x
    x = 2,518,893.38/1,661.32
  6. Step 6: Final answer
    x = 1,516.20

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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.