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Finding the Fourth Proportional to 524.00, 723.20 and 392.78

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Solution

The fourth proportional to 524.00, 723.20 and 392.78 is: 542.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.00 : 723.20 = 392.78 : x
  2. Step 2: Convert to fraction form
    524.00/723.20 = 392.78/x
  3. Step 3: Cross multiply
    524.00x = 723.20 × 392.78
  4. Step 4: Simplify right side
    524.00x = 284,058.34
  5. Step 5: Solve for x
    x = 284,058.34/524.00
  6. Step 6: Final answer
    x = 542.09

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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.