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Finding the Fourth Proportional to 564.90, 779.58 and 316.22

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Solution

The fourth proportional to 564.90, 779.58 and 316.22 is: 436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.90 : 779.58 = 316.22 : x
  2. Step 2: Convert to fraction form
    564.90/779.58 = 316.22/x
  3. Step 3: Cross multiply
    564.90x = 779.58 × 316.22
  4. Step 4: Simplify right side
    564.90x = 246,518.79
  5. Step 5: Solve for x
    x = 246,518.79/564.90
  6. Step 6: Final answer
    x = 436.39

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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.