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Finding the Fourth Proportional to 924.26, 1,386.38 and 878.12

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Solution

The fourth proportional to 924.26, 1,386.38 and 878.12 is: 1,317.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.26 : 1,386.38 = 878.12 : x
  2. Step 2: Convert to fraction form
    924.26/1,386.38 = 878.12/x
  3. Step 3: Cross multiply
    924.26x = 1,386.38 × 878.12
  4. Step 4: Simplify right side
    924.26x = 1,217,408.01
  5. Step 5: Solve for x
    x = 1,217,408.01/924.26
  6. Step 6: Final answer
    x = 1,317.17

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Why These Related Problems?

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