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Finding the Fourth Proportional to 908.72, 1,246.49 and 900.93

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Solution

The fourth proportional to 908.72, 1,246.49 and 900.93 is: 1,235.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.72 : 1,246.49 = 900.93 : x
  2. Step 2: Convert to fraction form
    908.72/1,246.49 = 900.93/x
  3. Step 3: Cross multiply
    908.72x = 1,246.49 × 900.93
  4. Step 4: Simplify right side
    908.72x = 1,123,000.24
  5. Step 5: Solve for x
    x = 1,123,000.24/908.72
  6. Step 6: Final answer
    x = 1,235.80

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.