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Finding the Fourth Proportional to 442.76, 610.74 and 287.24

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Solution

The fourth proportional to 442.76, 610.74 and 287.24 is: 396.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.76 : 610.74 = 287.24 : x
  2. Step 2: Convert to fraction form
    442.76/610.74 = 287.24/x
  3. Step 3: Cross multiply
    442.76x = 610.74 × 287.24
  4. Step 4: Simplify right side
    442.76x = 175,428.96
  5. Step 5: Solve for x
    x = 175,428.96/442.76
  6. Step 6: Final answer
    x = 396.22

Related Problems

Find fourth proportional to 221.38, 305.37 and 143.62
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Double scale
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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.