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Finding the Fourth Proportional to 418.75, 577.88 and 253.11

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Solution

The fourth proportional to 418.75, 577.88 and 253.11 is: 349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.75 : 577.88 = 253.11 : x
  2. Step 2: Convert to fraction form
    418.75/577.88 = 253.11/x
  3. Step 3: Cross multiply
    418.75x = 577.88 × 253.11
  4. Step 4: Simplify right side
    418.75x = 146,267.21
  5. Step 5: Solve for x
    x = 146,267.21/418.75
  6. Step 6: Final answer
    x = 349.29

Related Problems

Find fourth proportional to 209.38, 288.94 and 126.56
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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.