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Finding the Fourth Proportional to 591.46, 815.40 and 425.38

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Solution

The fourth proportional to 591.46, 815.40 and 425.38 is: 586.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.46 : 815.40 = 425.38 : x
  2. Step 2: Convert to fraction form
    591.46/815.40 = 425.38/x
  3. Step 3: Cross multiply
    591.46x = 815.40 × 425.38
  4. Step 4: Simplify right side
    591.46x = 346,854.85
  5. Step 5: Solve for x
    x = 346,854.85/591.46
  6. Step 6: Final answer
    x = 586.44

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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.