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Finding the Fourth Proportional to 880.60, 1,317.78 and 648.94

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Solution

The fourth proportional to 880.60, 1,317.78 and 648.94 is: 971.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.60 : 1,317.78 = 648.94 : x
  2. Step 2: Convert to fraction form
    880.60/1,317.78 = 648.94/x
  3. Step 3: Cross multiply
    880.60x = 1,317.78 × 648.94
  4. Step 4: Simplify right side
    880.60x = 855,160.15
  5. Step 5: Solve for x
    x = 855,160.15/880.60
  6. Step 6: Final answer
    x = 971.11

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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.