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Finding the Fourth Proportional to 561.68, 775.28 and 365.12

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Solution

The fourth proportional to 561.68, 775.28 and 365.12 is: 503.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.68 : 775.28 = 365.12 : x
  2. Step 2: Convert to fraction form
    561.68/775.28 = 365.12/x
  3. Step 3: Cross multiply
    561.68x = 775.28 × 365.12
  4. Step 4: Simplify right side
    561.68x = 283,070.23
  5. Step 5: Solve for x
    x = 283,070.23/561.68
  6. Step 6: Final answer
    x = 503.97

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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.