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Finding the Fourth Proportional to 719.64, 1,077.73 and 487.82

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Solution

The fourth proportional to 719.64, 1,077.73 and 487.82 is: 730.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.64 : 1,077.73 = 487.82 : x
  2. Step 2: Convert to fraction form
    719.64/1,077.73 = 487.82/x
  3. Step 3: Cross multiply
    719.64x = 1,077.73 × 487.82
  4. Step 4: Simplify right side
    719.64x = 525,742.30
  5. Step 5: Solve for x
    x = 525,742.30/719.64
  6. Step 6: Final answer
    x = 730.56

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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.