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Finding the Fourth Proportional to 517.58, 780.23 and 483.20

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Solution

The fourth proportional to 517.58, 780.23 and 483.20 is: 728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.58 : 780.23 = 483.20 : x
  2. Step 2: Convert to fraction form
    517.58/780.23 = 483.20/x
  3. Step 3: Cross multiply
    517.58x = 780.23 × 483.20
  4. Step 4: Simplify right side
    517.58x = 377,010.29
  5. Step 5: Solve for x
    x = 377,010.29/517.58
  6. Step 6: Final answer
    x = 728.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.