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Finding the Fourth Proportional to 559.48, 838.32 and 342.40

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Solution

The fourth proportional to 559.48, 838.32 and 342.40 is: 513.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.48 : 838.32 = 342.40 : x
  2. Step 2: Convert to fraction form
    559.48/838.32 = 342.40/x
  3. Step 3: Cross multiply
    559.48x = 838.32 × 342.40
  4. Step 4: Simplify right side
    559.48x = 287,040.77
  5. Step 5: Solve for x
    x = 287,040.77/559.48
  6. Step 6: Final answer
    x = 513.05

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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.