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Finding the Fourth Proportional to 559.10, 838.65 and 328.10

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Solution

The fourth proportional to 559.10, 838.65 and 328.10 is: 492.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.10 : 838.65 = 328.10 : x
  2. Step 2: Convert to fraction form
    559.10/838.65 = 328.10/x
  3. Step 3: Cross multiply
    559.10x = 838.65 × 328.10
  4. Step 4: Simplify right side
    559.10x = 275,161.07
  5. Step 5: Solve for x
    x = 275,161.07/559.10
  6. Step 6: Final answer
    x = 492.15

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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.