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Finding the Fourth Proportional to 1,348.71, 1,861.11 and 877.51

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Solution

The fourth proportional to 1,348.71, 1,861.11 and 877.51 is: 1,210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.71 : 1,861.11 = 877.51 : x
  2. Step 2: Convert to fraction form
    1,348.71/1,861.11 = 877.51/x
  3. Step 3: Cross multiply
    1,348.71x = 1,861.11 × 877.51
  4. Step 4: Simplify right side
    1,348.71x = 1,633,137.54
  5. Step 5: Solve for x
    x = 1,633,137.54/1,348.71
  6. Step 6: Final answer
    x = 1,210.89

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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.