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Finding the Fourth Proportional to 591.33, 815.34 and 404.91

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Solution

The fourth proportional to 591.33, 815.34 and 404.91 is: 558.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.33 : 815.34 = 404.91 : x
  2. Step 2: Convert to fraction form
    591.33/815.34 = 404.91/x
  3. Step 3: Cross multiply
    591.33x = 815.34 × 404.91
  4. Step 4: Simplify right side
    591.33x = 330,139.32
  5. Step 5: Solve for x
    x = 330,139.32/591.33
  6. Step 6: Final answer
    x = 558.30

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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.