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Finding the Fourth Proportional to 591.15, 815.74 and 339.10

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Solution

The fourth proportional to 591.15, 815.74 and 339.10 is: 467.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.15 : 815.74 = 339.10 : x
  2. Step 2: Convert to fraction form
    591.15/815.74 = 339.10/x
  3. Step 3: Cross multiply
    591.15x = 815.74 × 339.10
  4. Step 4: Simplify right side
    591.15x = 276,615.74
  5. Step 5: Solve for x
    x = 276,615.74/591.15
  6. Step 6: Final answer
    x = 467.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.