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Finding the Fourth Proportional to 648.61, 897.28 and 571.05

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Solution

The fourth proportional to 648.61, 897.28 and 571.05 is: 789.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.61 : 897.28 = 571.05 : x
  2. Step 2: Convert to fraction form
    648.61/897.28 = 571.05/x
  3. Step 3: Cross multiply
    648.61x = 897.28 × 571.05
  4. Step 4: Simplify right side
    648.61x = 512,390.32
  5. Step 5: Solve for x
    x = 512,390.32/648.61
  6. Step 6: Final answer
    x = 789.99

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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.