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Finding the Fourth Proportional to 427.90, 590.46 and 253.21

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Solution

The fourth proportional to 427.90, 590.46 and 253.21 is: 349.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.90 : 590.46 = 253.21 : x
  2. Step 2: Convert to fraction form
    427.90/590.46 = 253.21/x
  3. Step 3: Cross multiply
    427.90x = 590.46 × 253.21
  4. Step 4: Simplify right side
    427.90x = 149,510.38
  5. Step 5: Solve for x
    x = 149,510.38/427.90
  6. Step 6: Final answer
    x = 349.40

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Double scale
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Similar ratio
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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.