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Finding the Fourth Proportional to 639.51, 883.26 and 522.87

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Solution

The fourth proportional to 639.51, 883.26 and 522.87 is: 722.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.51 : 883.26 = 522.87 : x
  2. Step 2: Convert to fraction form
    639.51/883.26 = 522.87/x
  3. Step 3: Cross multiply
    639.51x = 883.26 × 522.87
  4. Step 4: Simplify right side
    639.51x = 461,830.16
  5. Step 5: Solve for x
    x = 461,830.16/639.51
  6. Step 6: Final answer
    x = 722.16

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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.