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Finding the Fourth Proportional to 655.20, 981.12 and 365.28

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Solution

The fourth proportional to 655.20, 981.12 and 365.28 is: 546.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.20 : 981.12 = 365.28 : x
  2. Step 2: Convert to fraction form
    655.20/981.12 = 365.28/x
  3. Step 3: Cross multiply
    655.20x = 981.12 × 365.28
  4. Step 4: Simplify right side
    655.20x = 358,383.51
  5. Step 5: Solve for x
    x = 358,383.51/655.20
  6. Step 6: Final answer
    x = 546.98

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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.