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Finding the Fourth Proportional to 1,359.28, 1,876 and 835.12

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Solution

The fourth proportional to 1,359.28, 1,876 and 835.12 is: 1,152.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.28 : 1,876 = 835.12 : x
  2. Step 2: Convert to fraction form
    1,359.28/1,876 = 835.12/x
  3. Step 3: Cross multiply
    1,359.28x = 1,876 × 835.12
  4. Step 4: Simplify right side
    1,359.28x = 1,566,685.12
  5. Step 5: Solve for x
    x = 1,566,685.12/1,359.28
  6. Step 6: Final answer
    x = 1,152.58

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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.