Home / 1,529.44-2,109.18-939.76

Finding the Fourth Proportional to 1,529.44, 2,109.18 and 939.76

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Solution

The fourth proportional to 1,529.44, 2,109.18 and 939.76 is: 1,295.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.44 : 2,109.18 = 939.76 : x
  2. Step 2: Convert to fraction form
    1,529.44/2,109.18 = 939.76/x
  3. Step 3: Cross multiply
    1,529.44x = 2,109.18 × 939.76
  4. Step 4: Simplify right side
    1,529.44x = 1,982,123.00
  5. Step 5: Solve for x
    x = 1,982,123.00/1,529.44
  6. Step 6: Final answer
    x = 1,295.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.