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Finding the Fourth Proportional to 1,539.32, 2,309.66 and 808.73

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Solution

The fourth proportional to 1,539.32, 2,309.66 and 808.73 is: 1,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.32 : 2,309.66 = 808.73 : x
  2. Step 2: Convert to fraction form
    1,539.32/2,309.66 = 808.73/x
  3. Step 3: Cross multiply
    1,539.32x = 2,309.66 × 808.73
  4. Step 4: Simplify right side
    1,539.32x = 1,867,875.74
  5. Step 5: Solve for x
    x = 1,867,875.74/1,539.32
  6. Step 6: Final answer
    x = 1,213.45

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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.