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Finding the Fourth Proportional to 719.15, 1,077.71 and 632.30

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Solution

The fourth proportional to 719.15, 1,077.71 and 632.30 is: 947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.15 : 1,077.71 = 632.30 : x
  2. Step 2: Convert to fraction form
    719.15/1,077.71 = 632.30/x
  3. Step 3: Cross multiply
    719.15x = 1,077.71 × 632.30
  4. Step 4: Simplify right side
    719.15x = 681,427.48
  5. Step 5: Solve for x
    x = 681,427.48/719.15
  6. Step 6: Final answer
    x = 947.55

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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.