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Finding the Fourth Proportional to 881.10, 1,320.45 and 719.10

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Solution

The fourth proportional to 881.10, 1,320.45 and 719.10 is: 1,077.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.10 : 1,320.45 = 719.10 : x
  2. Step 2: Convert to fraction form
    881.10/1,320.45 = 719.10/x
  3. Step 3: Cross multiply
    881.10x = 1,320.45 × 719.10
  4. Step 4: Simplify right side
    881.10x = 949,535.60
  5. Step 5: Solve for x
    x = 949,535.60/881.10
  6. Step 6: Final answer
    x = 1,077.67

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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.