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Finding the Fourth Proportional to 1,041.93, 1,563.05 and 311.42

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Solution

The fourth proportional to 1,041.93, 1,563.05 and 311.42 is: 467.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.93 : 1,563.05 = 311.42 : x
  2. Step 2: Convert to fraction form
    1,041.93/1,563.05 = 311.42/x
  3. Step 3: Cross multiply
    1,041.93x = 1,563.05 × 311.42
  4. Step 4: Simplify right side
    1,041.93x = 486,769.72
  5. Step 5: Solve for x
    x = 486,769.72/1,041.93
  6. Step 6: Final answer
    x = 467.18

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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.