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Finding the Fourth Proportional to 2,666.75, 3,680.01 and 1,487.79

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Solution

The fourth proportional to 2,666.75, 3,680.01 and 1,487.79 is: 2,053.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.75 : 3,680.01 = 1,487.79 : x
  2. Step 2: Convert to fraction form
    2,666.75/3,680.01 = 1,487.79/x
  3. Step 3: Cross multiply
    2,666.75x = 3,680.01 × 1,487.79
  4. Step 4: Simplify right side
    2,666.75x = 5,475,082.08
  5. Step 5: Solve for x
    x = 5,475,082.08/2,666.75
  6. Step 6: Final answer
    x = 2,053.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.