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Finding the Fourth Proportional to 929.09, 1,393.51 and 539.30

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Solution

The fourth proportional to 929.09, 1,393.51 and 539.30 is: 808.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.09 : 1,393.51 = 539.30 : x
  2. Step 2: Convert to fraction form
    929.09/1,393.51 = 539.30/x
  3. Step 3: Cross multiply
    929.09x = 1,393.51 × 539.30
  4. Step 4: Simplify right side
    929.09x = 751,517.81
  5. Step 5: Solve for x
    x = 751,517.81/929.09
  6. Step 6: Final answer
    x = 808.88

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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.