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Finding the Fourth Proportional to 564.87, 778.95 and 417.81

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Solution

The fourth proportional to 564.87, 778.95 and 417.81 is: 576.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.87 : 778.95 = 417.81 : x
  2. Step 2: Convert to fraction form
    564.87/778.95 = 417.81/x
  3. Step 3: Cross multiply
    564.87x = 778.95 × 417.81
  4. Step 4: Simplify right side
    564.87x = 325,453.10
  5. Step 5: Solve for x
    x = 325,453.10/564.87
  6. Step 6: Final answer
    x = 576.16

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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.