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Finding the Fourth Proportional to 572.78, 862.70 and 522.84

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Solution

The fourth proportional to 572.78, 862.70 and 522.84 is: 787.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.78 : 862.70 = 522.84 : x
  2. Step 2: Convert to fraction form
    572.78/862.70 = 522.84/x
  3. Step 3: Cross multiply
    572.78x = 862.70 × 522.84
  4. Step 4: Simplify right side
    572.78x = 451,054.07
  5. Step 5: Solve for x
    x = 451,054.07/572.78
  6. Step 6: Final answer
    x = 787.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.