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Finding the Fourth Proportional to 1,350.19, 1,863.48 and 879.47

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Solution

The fourth proportional to 1,350.19, 1,863.48 and 879.47 is: 1,213.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.19 : 1,863.48 = 879.47 : x
  2. Step 2: Convert to fraction form
    1,350.19/1,863.48 = 879.47/x
  3. Step 3: Cross multiply
    1,350.19x = 1,863.48 × 879.47
  4. Step 4: Simplify right side
    1,350.19x = 1,638,874.76
  5. Step 5: Solve for x
    x = 1,638,874.76/1,350.19
  6. Step 6: Final answer
    x = 1,213.81

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Half scale
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Double scale
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1.5x scale

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.