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Finding the Fourth Proportional to 1,666.80, 2,494.80 and 1,472.40

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Solution

The fourth proportional to 1,666.80, 2,494.80 and 1,472.40 is: 2,203.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.80 : 2,494.80 = 1,472.40 : x
  2. Step 2: Convert to fraction form
    1,666.80/2,494.80 = 1,472.40/x
  3. Step 3: Cross multiply
    1,666.80x = 2,494.80 × 1,472.40
  4. Step 4: Simplify right side
    1,666.80x = 3,673,343.52
  5. Step 5: Solve for x
    x = 3,673,343.52/1,666.80
  6. Step 6: Final answer
    x = 2,203.83

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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.