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Finding the Fourth Proportional to 1,348.94, 1,861.40 and 824.86

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Solution

The fourth proportional to 1,348.94, 1,861.40 and 824.86 is: 1,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.94 : 1,861.40 = 824.86 : x
  2. Step 2: Convert to fraction form
    1,348.94/1,861.40 = 824.86/x
  3. Step 3: Cross multiply
    1,348.94x = 1,861.40 × 824.86
  4. Step 4: Simplify right side
    1,348.94x = 1,535,394.40
  5. Step 5: Solve for x
    x = 1,535,394.40/1,348.94
  6. Step 6: Final answer
    x = 1,138.22

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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.