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Finding the Fourth Proportional to 4,987.85, 7,481.22 and 1,290.10

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Solution

The fourth proportional to 4,987.85, 7,481.22 and 1,290.10 is: 1,935.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.85 : 7,481.22 = 1,290.10 : x
  2. Step 2: Convert to fraction form
    4,987.85/7,481.22 = 1,290.10/x
  3. Step 3: Cross multiply
    4,987.85x = 7,481.22 × 1,290.10
  4. Step 4: Simplify right side
    4,987.85x = 9,651,521.92
  5. Step 5: Solve for x
    x = 9,651,521.92/4,987.85
  6. Step 6: Final answer
    x = 1,935.01

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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.