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Finding the Fourth Proportional to 442.75, 611.06 and 253.74

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Solution

The fourth proportional to 442.75, 611.06 and 253.74 is: 350.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.75 : 611.06 = 253.74 : x
  2. Step 2: Convert to fraction form
    442.75/611.06 = 253.74/x
  3. Step 3: Cross multiply
    442.75x = 611.06 × 253.74
  4. Step 4: Simplify right side
    442.75x = 155,050.36
  5. Step 5: Solve for x
    x = 155,050.36/442.75
  6. Step 6: Final answer
    x = 350.20

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Find fourth proportional to 221.38, 305.53 and 126.87
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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.