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Finding the Fourth Proportional to 626.49, 864.23 and 402.36

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Solution

The fourth proportional to 626.49, 864.23 and 402.36 is: 555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.49 : 864.23 = 402.36 : x
  2. Step 2: Convert to fraction form
    626.49/864.23 = 402.36/x
  3. Step 3: Cross multiply
    626.49x = 864.23 × 402.36
  4. Step 4: Simplify right side
    626.49x = 347,731.58
  5. Step 5: Solve for x
    x = 347,731.58/626.49
  6. Step 6: Final answer
    x = 555.05

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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.