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Finding the Fourth Proportional to 564.04, 778.12 and 398.26

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Solution

The fourth proportional to 564.04, 778.12 and 398.26 is: 549.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.04 : 778.12 = 398.26 : x
  2. Step 2: Convert to fraction form
    564.04/778.12 = 398.26/x
  3. Step 3: Cross multiply
    564.04x = 778.12 × 398.26
  4. Step 4: Simplify right side
    564.04x = 309,894.07
  5. Step 5: Solve for x
    x = 309,894.07/564.04
  6. Step 6: Final answer
    x = 549.42

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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.