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Finding the Fourth Proportional to 397.77, 595.26 and 391.62

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Solution

The fourth proportional to 397.77, 595.26 and 391.62 is: 586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.77 : 595.26 = 391.62 : x
  2. Step 2: Convert to fraction form
    397.77/595.26 = 391.62/x
  3. Step 3: Cross multiply
    397.77x = 595.26 × 391.62
  4. Step 4: Simplify right side
    397.77x = 233,115.72
  5. Step 5: Solve for x
    x = 233,115.72/397.77
  6. Step 6: Final answer
    x = 586.06

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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.