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Finding the Fourth Proportional to 1,026, 1,412.76 and 878.34

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Solution

The fourth proportional to 1,026, 1,412.76 and 878.34 is: 1,209.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026 : 1,412.76 = 878.34 : x
  2. Step 2: Convert to fraction form
    1,026/1,412.76 = 878.34/x
  3. Step 3: Cross multiply
    1,026x = 1,412.76 × 878.34
  4. Step 4: Simplify right side
    1,026x = 1,240,883.62
  5. Step 5: Solve for x
    x = 1,240,883.62/1,026
  6. Step 6: Final answer
    x = 1,209.44

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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.