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Finding the Fourth Proportional to 564.63, 779.05 and 315.93

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Solution

The fourth proportional to 564.63, 779.05 and 315.93 is: 435.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.63 : 779.05 = 315.93 : x
  2. Step 2: Convert to fraction form
    564.63/779.05 = 315.93/x
  3. Step 3: Cross multiply
    564.63x = 779.05 × 315.93
  4. Step 4: Simplify right side
    564.63x = 246,125.27
  5. Step 5: Solve for x
    x = 246,125.27/564.63
  6. Step 6: Final answer
    x = 435.91

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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.