Home / 1,115.28-1,672.52-384.66

Finding the Fourth Proportional to 1,115.28, 1,672.52 and 384.66

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Solution

The fourth proportional to 1,115.28, 1,672.52 and 384.66 is: 576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.28 : 1,672.52 = 384.66 : x
  2. Step 2: Convert to fraction form
    1,115.28/1,672.52 = 384.66/x
  3. Step 3: Cross multiply
    1,115.28x = 1,672.52 × 384.66
  4. Step 4: Simplify right side
    1,115.28x = 643,351.54
  5. Step 5: Solve for x
    x = 643,351.54/1,115.28
  6. Step 6: Final answer
    x = 576.85

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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.