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Finding the Fourth Proportional to 3,987.47, 5,980.80 and 1,066.07

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Solution

The fourth proportional to 3,987.47, 5,980.80 and 1,066.07 is: 1,599.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.47 : 5,980.80 = 1,066.07 : x
  2. Step 2: Convert to fraction form
    3,987.47/5,980.80 = 1,066.07/x
  3. Step 3: Cross multiply
    3,987.47x = 5,980.80 × 1,066.07
  4. Step 4: Simplify right side
    3,987.47x = 6,375,951.46
  5. Step 5: Solve for x
    x = 6,375,951.46/3,987.47
  6. Step 6: Final answer
    x = 1,599.00

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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.