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Finding the Fourth Proportional to 1,041.76, 1,562.46 and 311.20

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Solution

The fourth proportional to 1,041.76, 1,562.46 and 311.20 is: 466.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.76 : 1,562.46 = 311.20 : x
  2. Step 2: Convert to fraction form
    1,041.76/1,562.46 = 311.20/x
  3. Step 3: Cross multiply
    1,041.76x = 1,562.46 × 311.20
  4. Step 4: Simplify right side
    1,041.76x = 486,237.55
  5. Step 5: Solve for x
    x = 486,237.55/1,041.76
  6. Step 6: Final answer
    x = 466.75

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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.