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Finding the Fourth Proportional to 719.47, 1,077.61 and 616.96

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Solution

The fourth proportional to 719.47, 1,077.61 and 616.96 is: 924.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.47 : 1,077.61 = 616.96 : x
  2. Step 2: Convert to fraction form
    719.47/1,077.61 = 616.96/x
  3. Step 3: Cross multiply
    719.47x = 1,077.61 × 616.96
  4. Step 4: Simplify right side
    719.47x = 664,842.27
  5. Step 5: Solve for x
    x = 664,842.27/719.47
  6. Step 6: Final answer
    x = 924.07

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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.