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Finding the Fourth Proportional to 564.88, 847.32 and 321.40

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Solution

The fourth proportional to 564.88, 847.32 and 321.40 is: 482.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.88 : 847.32 = 321.40 : x
  2. Step 2: Convert to fraction form
    564.88/847.32 = 321.40/x
  3. Step 3: Cross multiply
    564.88x = 847.32 × 321.40
  4. Step 4: Simplify right side
    564.88x = 272,328.65
  5. Step 5: Solve for x
    x = 272,328.65/564.88
  6. Step 6: Final answer
    x = 482.10

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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.