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Finding the Fourth Proportional to 626.99, 865.92 and 431.07

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Solution

The fourth proportional to 626.99, 865.92 and 431.07 is: 595.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.99 : 865.92 = 431.07 : x
  2. Step 2: Convert to fraction form
    626.99/865.92 = 431.07/x
  3. Step 3: Cross multiply
    626.99x = 865.92 × 431.07
  4. Step 4: Simplify right side
    626.99x = 373,267.80
  5. Step 5: Solve for x
    x = 373,267.80/626.99
  6. Step 6: Final answer
    x = 595.34

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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.