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Finding the Fourth Proportional to 562.68, 776.56 and 329.80

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Solution

The fourth proportional to 562.68, 776.56 and 329.80 is: 455.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.68 : 776.56 = 329.80 : x
  2. Step 2: Convert to fraction form
    562.68/776.56 = 329.80/x
  3. Step 3: Cross multiply
    562.68x = 776.56 × 329.80
  4. Step 4: Simplify right side
    562.68x = 256,109.49
  5. Step 5: Solve for x
    x = 256,109.49/562.68
  6. Step 6: Final answer
    x = 455.16

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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.