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Finding the Fourth Proportional to 1,359.93, 1,876.68 and 828.63

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Solution

The fourth proportional to 1,359.93, 1,876.68 and 828.63 is: 1,143.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.93 : 1,876.68 = 828.63 : x
  2. Step 2: Convert to fraction form
    1,359.93/1,876.68 = 828.63/x
  3. Step 3: Cross multiply
    1,359.93x = 1,876.68 × 828.63
  4. Step 4: Simplify right side
    1,359.93x = 1,555,073.35
  5. Step 5: Solve for x
    x = 1,555,073.35/1,359.93
  6. Step 6: Final answer
    x = 1,143.50

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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.