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Finding the Fourth Proportional to 1,170.86, 1,615.75 and 673.57

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Solution

The fourth proportional to 1,170.86, 1,615.75 and 673.57 is: 929.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.86 : 1,615.75 = 673.57 : x
  2. Step 2: Convert to fraction form
    1,170.86/1,615.75 = 673.57/x
  3. Step 3: Cross multiply
    1,170.86x = 1,615.75 × 673.57
  4. Step 4: Simplify right side
    1,170.86x = 1,088,311.97
  5. Step 5: Solve for x
    x = 1,088,311.97/1,170.86
  6. Step 6: Final answer
    x = 929.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.