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Finding the Fourth Proportional to 1,326.48, 1,987.89 and 1,001.49

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Solution

The fourth proportional to 1,326.48, 1,987.89 and 1,001.49 is: 1,500.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.48 : 1,987.89 = 1,001.49 : x
  2. Step 2: Convert to fraction form
    1,326.48/1,987.89 = 1,001.49/x
  3. Step 3: Cross multiply
    1,326.48x = 1,987.89 × 1,001.49
  4. Step 4: Simplify right side
    1,326.48x = 1,990,851.96
  5. Step 5: Solve for x
    x = 1,990,851.96/1,326.48
  6. Step 6: Final answer
    x = 1,500.85

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Double scale
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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.