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Finding the Fourth Proportional to 564.08, 778.60 and 384.64

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Solution

The fourth proportional to 564.08, 778.60 and 384.64 is: 530.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.08 : 778.60 = 384.64 : x
  2. Step 2: Convert to fraction form
    564.08/778.60 = 384.64/x
  3. Step 3: Cross multiply
    564.08x = 778.60 × 384.64
  4. Step 4: Simplify right side
    564.08x = 299,480.70
  5. Step 5: Solve for x
    x = 299,480.70/564.08
  6. Step 6: Final answer
    x = 530.92

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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.