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Finding the Fourth Proportional to 917.13, 1,375.71 and 483.39

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Solution

The fourth proportional to 917.13, 1,375.71 and 483.39 is: 725.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.13 : 1,375.71 = 483.39 : x
  2. Step 2: Convert to fraction form
    917.13/1,375.71 = 483.39/x
  3. Step 3: Cross multiply
    917.13x = 1,375.71 × 483.39
  4. Step 4: Simplify right side
    917.13x = 665,004.46
  5. Step 5: Solve for x
    x = 665,004.46/917.13
  6. Step 6: Final answer
    x = 725.09

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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.