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Finding the Fourth Proportional to 559.96, 840.38 and 387.83

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Solution

The fourth proportional to 559.96, 840.38 and 387.83 is: 582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.96 : 840.38 = 387.83 : x
  2. Step 2: Convert to fraction form
    559.96/840.38 = 387.83/x
  3. Step 3: Cross multiply
    559.96x = 840.38 × 387.83
  4. Step 4: Simplify right side
    559.96x = 325,924.74
  5. Step 5: Solve for x
    x = 325,924.74/559.96
  6. Step 6: Final answer
    x = 582.05

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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.