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Finding the Fourth Proportional to 591.20, 815.47 and 369.77

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Solution

The fourth proportional to 591.20, 815.47 and 369.77 is: 510.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.20 : 815.47 = 369.77 : x
  2. Step 2: Convert to fraction form
    591.20/815.47 = 369.77/x
  3. Step 3: Cross multiply
    591.20x = 815.47 × 369.77
  4. Step 4: Simplify right side
    591.20x = 301,531.34
  5. Step 5: Solve for x
    x = 301,531.34/591.20
  6. Step 6: Final answer
    x = 510.03

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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.