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Finding the Fourth Proportional to 562.62, 776.43 and 388.02

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Solution

The fourth proportional to 562.62, 776.43 and 388.02 is: 535.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.62 : 776.43 = 388.02 : x
  2. Step 2: Convert to fraction form
    562.62/776.43 = 388.02/x
  3. Step 3: Cross multiply
    562.62x = 776.43 × 388.02
  4. Step 4: Simplify right side
    562.62x = 301,270.37
  5. Step 5: Solve for x
    x = 301,270.37/562.62
  6. Step 6: Final answer
    x = 535.48

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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.