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Finding the Fourth Proportional to 1,041.81, 1,562.49 and 311.19

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Solution

The fourth proportional to 1,041.81, 1,562.49 and 311.19 is: 466.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.81 : 1,562.49 = 311.19 : x
  2. Step 2: Convert to fraction form
    1,041.81/1,562.49 = 311.19/x
  3. Step 3: Cross multiply
    1,041.81x = 1,562.49 × 311.19
  4. Step 4: Simplify right side
    1,041.81x = 486,231.26
  5. Step 5: Solve for x
    x = 486,231.26/1,041.81
  6. Step 6: Final answer
    x = 466.72

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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.