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Finding the Fourth Proportional to 4,988.66, 7,483.11 and 1,290.87

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Solution

The fourth proportional to 4,988.66, 7,483.11 and 1,290.87 is: 1,936.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,988.66 : 7,483.11 = 1,290.87 : x
  2. Step 2: Convert to fraction form
    4,988.66/7,483.11 = 1,290.87/x
  3. Step 3: Cross multiply
    4,988.66x = 7,483.11 × 1,290.87
  4. Step 4: Simplify right side
    4,988.66x = 9,659,722.21
  5. Step 5: Solve for x
    x = 9,659,722.21/4,988.66
  6. Step 6: Final answer
    x = 1,936.34

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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.