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Finding the Fourth Proportional to 521.58, 782.40 and 174.90

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Solution

The fourth proportional to 521.58, 782.40 and 174.90 is: 262.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.58 : 782.40 = 174.90 : x
  2. Step 2: Convert to fraction form
    521.58/782.40 = 174.90/x
  3. Step 3: Cross multiply
    521.58x = 782.40 × 174.90
  4. Step 4: Simplify right side
    521.58x = 136,841.76
  5. Step 5: Solve for x
    x = 136,841.76/521.58
  6. Step 6: Final answer
    x = 262.36

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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.