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Finding the Fourth Proportional to 649.22, 972.95 and 356.28

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Solution

The fourth proportional to 649.22, 972.95 and 356.28 is: 533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.22 : 972.95 = 356.28 : x
  2. Step 2: Convert to fraction form
    649.22/972.95 = 356.28/x
  3. Step 3: Cross multiply
    649.22x = 972.95 × 356.28
  4. Step 4: Simplify right side
    649.22x = 346,640.84
  5. Step 5: Solve for x
    x = 346,640.84/649.22
  6. Step 6: Final answer
    x = 533.94

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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.