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Finding the Fourth Proportional to 946.22, 1,306.14 and 553.25

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Solution

The fourth proportional to 946.22, 1,306.14 and 553.25 is: 763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.22 : 1,306.14 = 553.25 : x
  2. Step 2: Convert to fraction form
    946.22/1,306.14 = 553.25/x
  3. Step 3: Cross multiply
    946.22x = 1,306.14 × 553.25
  4. Step 4: Simplify right side
    946.22x = 722,621.96
  5. Step 5: Solve for x
    x = 722,621.96/946.22
  6. Step 6: Final answer
    x = 763.69

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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.