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Finding the Fourth Proportional to 559.99, 840.18 and 393.39

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Solution

The fourth proportional to 559.99, 840.18 and 393.39 is: 590.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.99 : 840.18 = 393.39 : x
  2. Step 2: Convert to fraction form
    559.99/840.18 = 393.39/x
  3. Step 3: Cross multiply
    559.99x = 840.18 × 393.39
  4. Step 4: Simplify right side
    559.99x = 330,516.44
  5. Step 5: Solve for x
    x = 330,516.44/559.99
  6. Step 6: Final answer
    x = 590.22

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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.