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Finding the Fourth Proportional to 1,041.99, 1,563.06 and 311.55

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Solution

The fourth proportional to 1,041.99, 1,563.06 and 311.55 is: 467.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.99 : 1,563.06 = 311.55 : x
  2. Step 2: Convert to fraction form
    1,041.99/1,563.06 = 311.55/x
  3. Step 3: Cross multiply
    1,041.99x = 1,563.06 × 311.55
  4. Step 4: Simplify right side
    1,041.99x = 486,975.44
  5. Step 5: Solve for x
    x = 486,975.44/1,041.99
  6. Step 6: Final answer
    x = 467.35

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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.