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Finding the Fourth Proportional to 650.47, 897.65 and 388.49

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Solution

The fourth proportional to 650.47, 897.65 and 388.49 is: 536.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.47 : 897.65 = 388.49 : x
  2. Step 2: Convert to fraction form
    650.47/897.65 = 388.49/x
  3. Step 3: Cross multiply
    650.47x = 897.65 × 388.49
  4. Step 4: Simplify right side
    650.47x = 348,728.05
  5. Step 5: Solve for x
    x = 348,728.05/650.47
  6. Step 6: Final answer
    x = 536.12

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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.