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Finding the Fourth Proportional to 917.79, 1,375.47 and 673.17

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Solution

The fourth proportional to 917.79, 1,375.47 and 673.17 is: 1,008.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.79 : 1,375.47 = 673.17 : x
  2. Step 2: Convert to fraction form
    917.79/1,375.47 = 673.17/x
  3. Step 3: Cross multiply
    917.79x = 1,375.47 × 673.17
  4. Step 4: Simplify right side
    917.79x = 925,925.14
  5. Step 5: Solve for x
    x = 925,925.14/917.79
  6. Step 6: Final answer
    x = 1,008.86

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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.