Home / 1,289.28-1,931.76-1,014.96

Finding the Fourth Proportional to 1,289.28, 1,931.76 and 1,014.96

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Solution

The fourth proportional to 1,289.28, 1,931.76 and 1,014.96 is: 1,520.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.28 : 1,931.76 = 1,014.96 : x
  2. Step 2: Convert to fraction form
    1,289.28/1,931.76 = 1,014.96/x
  3. Step 3: Cross multiply
    1,289.28x = 1,931.76 × 1,014.96
  4. Step 4: Simplify right side
    1,289.28x = 1,960,659.13
  5. Step 5: Solve for x
    x = 1,960,659.13/1,289.28
  6. Step 6: Final answer
    x = 1,520.74

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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.