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Finding the Fourth Proportional to 1,541.53, 2,127.32 and 878.43

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Solution

The fourth proportional to 1,541.53, 2,127.32 and 878.43 is: 1,212.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.53 : 2,127.32 = 878.43 : x
  2. Step 2: Convert to fraction form
    1,541.53/2,127.32 = 878.43/x
  3. Step 3: Cross multiply
    1,541.53x = 2,127.32 × 878.43
  4. Step 4: Simplify right side
    1,541.53x = 1,868,701.71
  5. Step 5: Solve for x
    x = 1,868,701.71/1,541.53
  6. Step 6: Final answer
    x = 1,212.24

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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.