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Finding the Fourth Proportional to 3,987.58, 5,981.13 and 1,488.28

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Solution

The fourth proportional to 3,987.58, 5,981.13 and 1,488.28 is: 2,232.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.58 : 5,981.13 = 1,488.28 : x
  2. Step 2: Convert to fraction form
    3,987.58/5,981.13 = 1,488.28/x
  3. Step 3: Cross multiply
    3,987.58x = 5,981.13 × 1,488.28
  4. Step 4: Simplify right side
    3,987.58x = 8,901,596.16
  5. Step 5: Solve for x
    x = 8,901,596.16/3,987.58
  6. Step 6: Final answer
    x = 2,232.33

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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.