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Finding the Fourth Proportional to 521.01, 781.36 and 174.26

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Solution

The fourth proportional to 521.01, 781.36 and 174.26 is: 261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.01 : 781.36 = 174.26 : x
  2. Step 2: Convert to fraction form
    521.01/781.36 = 174.26/x
  3. Step 3: Cross multiply
    521.01x = 781.36 × 174.26
  4. Step 4: Simplify right side
    521.01x = 136,161.31
  5. Step 5: Solve for x
    x = 136,161.31/521.01
  6. Step 6: Final answer
    x = 261.34

Related Problems

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Half scale
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Double scale
Find fourth proportional to 522.01, 782.86 and 175.26
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.