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Finding the Fourth Proportional to 650.36, 897.36 and 388.40

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Solution

The fourth proportional to 650.36, 897.36 and 388.40 is: 535.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.36 : 897.36 = 388.40 : x
  2. Step 2: Convert to fraction form
    650.36/897.36 = 388.40/x
  3. Step 3: Cross multiply
    650.36x = 897.36 × 388.40
  4. Step 4: Simplify right side
    650.36x = 348,534.62
  5. Step 5: Solve for x
    x = 348,534.62/650.36
  6. Step 6: Final answer
    x = 535.91

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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.