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Finding the Fourth Proportional to 1,451.07, 2,177.33 and 671.65

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Solution

The fourth proportional to 1,451.07, 2,177.33 and 671.65 is: 1,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.07 : 2,177.33 = 671.65 : x
  2. Step 2: Convert to fraction form
    1,451.07/2,177.33 = 671.65/x
  3. Step 3: Cross multiply
    1,451.07x = 2,177.33 × 671.65
  4. Step 4: Simplify right side
    1,451.07x = 1,462,394.89
  5. Step 5: Solve for x
    x = 1,462,394.89/1,451.07
  6. Step 6: Final answer
    x = 1,007.80

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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.