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Finding the Fourth Proportional to 561.06, 773.74 and 386.46

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Solution

The fourth proportional to 561.06, 773.74 and 386.46 is: 532.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.06 : 773.74 = 386.46 : x
  2. Step 2: Convert to fraction form
    561.06/773.74 = 386.46/x
  3. Step 3: Cross multiply
    561.06x = 773.74 × 386.46
  4. Step 4: Simplify right side
    561.06x = 299,019.56
  5. Step 5: Solve for x
    x = 299,019.56/561.06
  6. Step 6: Final answer
    x = 532.95

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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.