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Finding the Fourth Proportional to 564.96, 847.71 and 420.96

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Solution

The fourth proportional to 564.96, 847.71 and 420.96 is: 631.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.96 : 847.71 = 420.96 : x
  2. Step 2: Convert to fraction form
    564.96/847.71 = 420.96/x
  3. Step 3: Cross multiply
    564.96x = 847.71 × 420.96
  4. Step 4: Simplify right side
    564.96x = 356,852.00
  5. Step 5: Solve for x
    x = 356,852.00/564.96
  6. Step 6: Final answer
    x = 631.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.