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Finding the Fourth Proportional to 570.38, 854.85 and 492.78

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Solution

The fourth proportional to 570.38, 854.85 and 492.78 is: 738.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.38 : 854.85 = 492.78 : x
  2. Step 2: Convert to fraction form
    570.38/854.85 = 492.78/x
  3. Step 3: Cross multiply
    570.38x = 854.85 × 492.78
  4. Step 4: Simplify right side
    570.38x = 421,252.98
  5. Step 5: Solve for x
    x = 421,252.98/570.38
  6. Step 6: Final answer
    x = 738.55

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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.