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Finding the Fourth Proportional to 4,889.70, 7,335.90 and 2,117.70

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Solution

The fourth proportional to 4,889.70, 7,335.90 and 2,117.70 is: 3,177.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,889.70 : 7,335.90 = 2,117.70 : x
  2. Step 2: Convert to fraction form
    4,889.70/7,335.90 = 2,117.70/x
  3. Step 3: Cross multiply
    4,889.70x = 7,335.90 × 2,117.70
  4. Step 4: Simplify right side
    4,889.70x = 15,535,235.43
  5. Step 5: Solve for x
    x = 15,535,235.43/4,889.70
  6. Step 6: Final answer
    x = 3,177.13

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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.