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Finding the Fourth Proportional to 626.99, 865.28 and 347.24

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Solution

The fourth proportional to 626.99, 865.28 and 347.24 is: 479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.99 : 865.28 = 347.24 : x
  2. Step 2: Convert to fraction form
    626.99/865.28 = 347.24/x
  3. Step 3: Cross multiply
    626.99x = 865.28 × 347.24
  4. Step 4: Simplify right side
    626.99x = 300,457.99
  5. Step 5: Solve for x
    x = 300,457.99/626.99
  6. Step 6: Final answer
    x = 479.21

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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.