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Finding the Fourth Proportional to 559.52, 840.78 and 477.52

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Solution

The fourth proportional to 559.52, 840.78 and 477.52 is: 717.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.52 : 840.78 = 477.52 : x
  2. Step 2: Convert to fraction form
    559.52/840.78 = 477.52/x
  3. Step 3: Cross multiply
    559.52x = 840.78 × 477.52
  4. Step 4: Simplify right side
    559.52x = 401,489.27
  5. Step 5: Solve for x
    x = 401,489.27/559.52
  6. Step 6: Final answer
    x = 717.56

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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.