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Finding the Fourth Proportional to 1,541.47, 2,127.33 and 878.23

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Solution

The fourth proportional to 1,541.47, 2,127.33 and 878.23 is: 1,212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.47 : 2,127.33 = 878.23 : x
  2. Step 2: Convert to fraction form
    1,541.47/2,127.33 = 878.23/x
  3. Step 3: Cross multiply
    1,541.47x = 2,127.33 × 878.23
  4. Step 4: Simplify right side
    1,541.47x = 1,868,285.03
  5. Step 5: Solve for x
    x = 1,868,285.03/1,541.47
  6. Step 6: Final answer
    x = 1,212.02

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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.