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Finding the Fourth Proportional to 719.28, 1,077.89 and 410.49

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Solution

The fourth proportional to 719.28, 1,077.89 and 410.49 is: 615.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.28 : 1,077.89 = 410.49 : x
  2. Step 2: Convert to fraction form
    719.28/1,077.89 = 410.49/x
  3. Step 3: Cross multiply
    719.28x = 1,077.89 × 410.49
  4. Step 4: Simplify right side
    719.28x = 442,461.01
  5. Step 5: Solve for x
    x = 442,461.01/719.28
  6. Step 6: Final answer
    x = 615.14

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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.