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Finding the Fourth Proportional to 564.45, 778.91 and 328.36

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Solution

The fourth proportional to 564.45, 778.91 and 328.36 is: 453.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.45 : 778.91 = 328.36 : x
  2. Step 2: Convert to fraction form
    564.45/778.91 = 328.36/x
  3. Step 3: Cross multiply
    564.45x = 778.91 × 328.36
  4. Step 4: Simplify right side
    564.45x = 255,762.89
  5. Step 5: Solve for x
    x = 255,762.89/564.45
  6. Step 6: Final answer
    x = 453.12

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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.