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Finding the Fourth Proportional to 3,987.63, 5,980.98 and 1,066.17

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Solution

The fourth proportional to 3,987.63, 5,980.98 and 1,066.17 is: 1,599.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.63 : 5,980.98 = 1,066.17 : x
  2. Step 2: Convert to fraction form
    3,987.63/5,980.98 = 1,066.17/x
  3. Step 3: Cross multiply
    3,987.63x = 5,980.98 × 1,066.17
  4. Step 4: Simplify right side
    3,987.63x = 6,376,741.45
  5. Step 5: Solve for x
    x = 6,376,741.45/3,987.63
  6. Step 6: Final answer
    x = 1,599.13

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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.