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Finding the Fourth Proportional to 718.24, 1,076.20 and 511.84

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Solution

The fourth proportional to 718.24, 1,076.20 and 511.84 is: 766.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.24 : 1,076.20 = 511.84 : x
  2. Step 2: Convert to fraction form
    718.24/1,076.20 = 511.84/x
  3. Step 3: Cross multiply
    718.24x = 1,076.20 × 511.84
  4. Step 4: Simplify right side
    718.24x = 550,842.21
  5. Step 5: Solve for x
    x = 550,842.21/718.24
  6. Step 6: Final answer
    x = 766.93

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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.