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Finding the Fourth Proportional to 1,755, 2,618.89 and 1,521.72

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Solution

The fourth proportional to 1,755, 2,618.89 and 1,521.72 is: 2,270.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755 : 2,618.89 = 1,521.72 : x
  2. Step 2: Convert to fraction form
    1,755/2,618.89 = 1,521.72/x
  3. Step 3: Cross multiply
    1,755x = 2,618.89 × 1,521.72
  4. Step 4: Simplify right side
    1,755x = 3,985,213.49
  5. Step 5: Solve for x
    x = 3,985,213.49/1,755
  6. Step 6: Final answer
    x = 2,270.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.