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Finding the Fourth Proportional to 564.36, 842.28 and 549.78

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Solution

The fourth proportional to 564.36, 842.28 and 549.78 is: 820.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.36 : 842.28 = 549.78 : x
  2. Step 2: Convert to fraction form
    564.36/842.28 = 549.78/x
  3. Step 3: Cross multiply
    564.36x = 842.28 × 549.78
  4. Step 4: Simplify right side
    564.36x = 463,068.70
  5. Step 5: Solve for x
    x = 463,068.70/564.36
  6. Step 6: Final answer
    x = 820.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.