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Finding the Fourth Proportional to 946.22, 1,305.74 and 553.21

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Solution

The fourth proportional to 946.22, 1,305.74 and 553.21 is: 763.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.22 : 1,305.74 = 553.21 : x
  2. Step 2: Convert to fraction form
    946.22/1,305.74 = 553.21/x
  3. Step 3: Cross multiply
    946.22x = 1,305.74 × 553.21
  4. Step 4: Simplify right side
    946.22x = 722,346.54
  5. Step 5: Solve for x
    x = 722,346.54/946.22
  6. Step 6: Final answer
    x = 763.41

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Double scale
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1.5x scale

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.