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Finding the Fourth Proportional to 946.22, 1,305.59 and 553.17

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Solution

The fourth proportional to 946.22, 1,305.59 and 553.17 is: 763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.22 : 1,305.59 = 553.17 : x
  2. Step 2: Convert to fraction form
    946.22/1,305.59 = 553.17/x
  3. Step 3: Cross multiply
    946.22x = 1,305.59 × 553.17
  4. Step 4: Simplify right side
    946.22x = 722,211.84
  5. Step 5: Solve for x
    x = 722,211.84/946.22
  6. Step 6: Final answer
    x = 763.26

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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.