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Finding the Fourth Proportional to 1,350.71, 1,863.68 and 790.89

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Solution

The fourth proportional to 1,350.71, 1,863.68 and 790.89 is: 1,091.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.71 : 1,863.68 = 790.89 : x
  2. Step 2: Convert to fraction form
    1,350.71/1,863.68 = 790.89/x
  3. Step 3: Cross multiply
    1,350.71x = 1,863.68 × 790.89
  4. Step 4: Simplify right side
    1,350.71x = 1,473,961.92
  5. Step 5: Solve for x
    x = 1,473,961.92/1,350.71
  6. Step 6: Final answer
    x = 1,091.25

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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.