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Finding the Fourth Proportional to 632.19, 872.42 and 356.19

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Solution

The fourth proportional to 632.19, 872.42 and 356.19 is: 491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.19 : 872.42 = 356.19 : x
  2. Step 2: Convert to fraction form
    632.19/872.42 = 356.19/x
  3. Step 3: Cross multiply
    632.19x = 872.42 × 356.19
  4. Step 4: Simplify right side
    632.19x = 310,747.28
  5. Step 5: Solve for x
    x = 310,747.28/632.19
  6. Step 6: Final answer
    x = 491.54

Related Problems

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Half scale
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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.