Home / 1,289.20-1,933.44-630.76

Finding the Fourth Proportional to 1,289.20, 1,933.44 and 630.76

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Solution

The fourth proportional to 1,289.20, 1,933.44 and 630.76 is: 945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.20 : 1,933.44 = 630.76 : x
  2. Step 2: Convert to fraction form
    1,289.20/1,933.44 = 630.76/x
  3. Step 3: Cross multiply
    1,289.20x = 1,933.44 × 630.76
  4. Step 4: Simplify right side
    1,289.20x = 1,219,536.61
  5. Step 5: Solve for x
    x = 1,219,536.61/1,289.20
  6. Step 6: Final answer
    x = 945.96

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1.5x scale

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.