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Finding the Fourth Proportional to 1,279.33, 1,917.55 and 630.52

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Solution

The fourth proportional to 1,279.33, 1,917.55 and 630.52 is: 945.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.33 : 1,917.55 = 630.52 : x
  2. Step 2: Convert to fraction form
    1,279.33/1,917.55 = 630.52/x
  3. Step 3: Cross multiply
    1,279.33x = 1,917.55 × 630.52
  4. Step 4: Simplify right side
    1,279.33x = 1,209,053.63
  5. Step 5: Solve for x
    x = 1,209,053.63/1,279.33
  6. Step 6: Final answer
    x = 945.07

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.