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Finding the Fourth Proportional to 910.51, 1,373.85 and 876.79

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Solution

The fourth proportional to 910.51, 1,373.85 and 876.79 is: 1,322.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.51 : 1,373.85 = 876.79 : x
  2. Step 2: Convert to fraction form
    910.51/1,373.85 = 876.79/x
  3. Step 3: Cross multiply
    910.51x = 1,373.85 × 876.79
  4. Step 4: Simplify right side
    910.51x = 1,204,577.94
  5. Step 5: Solve for x
    x = 1,204,577.94/910.51
  6. Step 6: Final answer
    x = 1,322.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.