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Finding the Fourth Proportional to 2,618.75, 3,612.65 and 1,623.66

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Solution

The fourth proportional to 2,618.75, 3,612.65 and 1,623.66 is: 2,239.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.75 : 3,612.65 = 1,623.66 : x
  2. Step 2: Convert to fraction form
    2,618.75/3,612.65 = 1,623.66/x
  3. Step 3: Cross multiply
    2,618.75x = 3,612.65 × 1,623.66
  4. Step 4: Simplify right side
    2,618.75x = 5,865,715.30
  5. Step 5: Solve for x
    x = 5,865,715.30/2,618.75
  6. Step 6: Final answer
    x = 2,239.89

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1.5x scale

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.