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Finding the Fourth Proportional to 590.22, 813.78 and 491.94

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Solution

The fourth proportional to 590.22, 813.78 and 491.94 is: 678.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.22 : 813.78 = 491.94 : x
  2. Step 2: Convert to fraction form
    590.22/813.78 = 491.94/x
  3. Step 3: Cross multiply
    590.22x = 813.78 × 491.94
  4. Step 4: Simplify right side
    590.22x = 400,330.93
  5. Step 5: Solve for x
    x = 400,330.93/590.22
  6. Step 6: Final answer
    x = 678.27

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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.