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Finding the Fourth Proportional to 1,541.73, 2,127.50 and 878.58

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Solution

The fourth proportional to 1,541.73, 2,127.50 and 878.58 is: 1,212.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.73 : 2,127.50 = 878.58 : x
  2. Step 2: Convert to fraction form
    1,541.73/2,127.50 = 878.58/x
  3. Step 3: Cross multiply
    1,541.73x = 2,127.50 × 878.58
  4. Step 4: Simplify right side
    1,541.73x = 1,869,178.95
  5. Step 5: Solve for x
    x = 1,869,178.95/1,541.73
  6. Step 6: Final answer
    x = 1,212.39

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1.5x scale

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.