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Finding the Fourth Proportional to 566.50, 780.96 and 391.54

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Solution

The fourth proportional to 566.50, 780.96 and 391.54 is: 539.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.50 : 780.96 = 391.54 : x
  2. Step 2: Convert to fraction form
    566.50/780.96 = 391.54/x
  3. Step 3: Cross multiply
    566.50x = 780.96 × 391.54
  4. Step 4: Simplify right side
    566.50x = 305,777.08
  5. Step 5: Solve for x
    x = 305,777.08/566.50
  6. Step 6: Final answer
    x = 539.77

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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.