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Finding the Fourth Proportional to 917.68, 1,375.61 and 587.68

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Solution

The fourth proportional to 917.68, 1,375.61 and 587.68 is: 880.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.68 : 1,375.61 = 587.68 : x
  2. Step 2: Convert to fraction form
    917.68/1,375.61 = 587.68/x
  3. Step 3: Cross multiply
    917.68x = 1,375.61 × 587.68
  4. Step 4: Simplify right side
    917.68x = 808,419.95
  5. Step 5: Solve for x
    x = 808,419.95/917.68
  6. Step 6: Final answer
    x = 880.94

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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.