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Finding the Fourth Proportional to 568.19, 853.30 and 478.08

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Solution

The fourth proportional to 568.19, 853.30 and 478.08 is: 717.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.19 : 853.30 = 478.08 : x
  2. Step 2: Convert to fraction form
    568.19/853.30 = 478.08/x
  3. Step 3: Cross multiply
    568.19x = 853.30 × 478.08
  4. Step 4: Simplify right side
    568.19x = 407,945.66
  5. Step 5: Solve for x
    x = 407,945.66/568.19
  6. Step 6: Final answer
    x = 717.97

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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.