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Finding the Fourth Proportional to 640.26, 882.75 and 522.10

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Solution

The fourth proportional to 640.26, 882.75 and 522.10 is: 719.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.26 : 882.75 = 522.10 : x
  2. Step 2: Convert to fraction form
    640.26/882.75 = 522.10/x
  3. Step 3: Cross multiply
    640.26x = 882.75 × 522.10
  4. Step 4: Simplify right side
    640.26x = 460,883.78
  5. Step 5: Solve for x
    x = 460,883.78/640.26
  6. Step 6: Final answer
    x = 719.84

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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.