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Finding the Fourth Proportional to 590.78, 814.72 and 401.51

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Solution

The fourth proportional to 590.78, 814.72 and 401.51 is: 553.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.78 : 814.72 = 401.51 : x
  2. Step 2: Convert to fraction form
    590.78/814.72 = 401.51/x
  3. Step 3: Cross multiply
    590.78x = 814.72 × 401.51
  4. Step 4: Simplify right side
    590.78x = 327,118.23
  5. Step 5: Solve for x
    x = 327,118.23/590.78
  6. Step 6: Final answer
    x = 553.71

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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.