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Finding the Fourth Proportional to 1,540.59, 2,306.78 and 808.63

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Solution

The fourth proportional to 1,540.59, 2,306.78 and 808.63 is: 1,210.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.59 : 2,306.78 = 808.63 : x
  2. Step 2: Convert to fraction form
    1,540.59/2,306.78 = 808.63/x
  3. Step 3: Cross multiply
    1,540.59x = 2,306.78 × 808.63
  4. Step 4: Simplify right side
    1,540.59x = 1,865,331.51
  5. Step 5: Solve for x
    x = 1,865,331.51/1,540.59
  6. Step 6: Final answer
    x = 1,210.79

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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.