Home / 1,538.76-2,123.52-1,015.76

Finding the Fourth Proportional to 1,538.76, 2,123.52 and 1,015.76

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Solution

The fourth proportional to 1,538.76, 2,123.52 and 1,015.76 is: 1,401.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.76 : 2,123.52 = 1,015.76 : x
  2. Step 2: Convert to fraction form
    1,538.76/2,123.52 = 1,015.76/x
  3. Step 3: Cross multiply
    1,538.76x = 2,123.52 × 1,015.76
  4. Step 4: Simplify right side
    1,538.76x = 2,156,986.68
  5. Step 5: Solve for x
    x = 2,156,986.68/1,538.76
  6. Step 6: Final answer
    x = 1,401.77

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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.