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Finding the Fourth Proportional to 650.91, 898.52 and 388.88

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Solution

The fourth proportional to 650.91, 898.52 and 388.88 is: 536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.91 : 898.52 = 388.88 : x
  2. Step 2: Convert to fraction form
    650.91/898.52 = 388.88/x
  3. Step 3: Cross multiply
    650.91x = 898.52 × 388.88
  4. Step 4: Simplify right side
    650.91x = 349,410.02
  5. Step 5: Solve for x
    x = 349,410.02/650.91
  6. Step 6: Final answer
    x = 536.80

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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.