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Finding the Fourth Proportional to 536.60, 803.76 and 392

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Solution

The fourth proportional to 536.60, 803.76 and 392 is: 587.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.60 : 803.76 = 392 : x
  2. Step 2: Convert to fraction form
    536.60/803.76 = 392/x
  3. Step 3: Cross multiply
    536.60x = 803.76 × 392
  4. Step 4: Simplify right side
    536.60x = 315,073.92
  5. Step 5: Solve for x
    x = 315,073.92/536.60
  6. Step 6: Final answer
    x = 587.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.