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Finding the Fourth Proportional to 1,552.94, 2,143.09 and 854.31

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Solution

The fourth proportional to 1,552.94, 2,143.09 and 854.31 is: 1,178.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,552.94 : 2,143.09 = 854.31 : x
  2. Step 2: Convert to fraction form
    1,552.94/2,143.09 = 854.31/x
  3. Step 3: Cross multiply
    1,552.94x = 2,143.09 × 854.31
  4. Step 4: Simplify right side
    1,552.94x = 1,830,863.22
  5. Step 5: Solve for x
    x = 1,830,863.22/1,552.94
  6. Step 6: Final answer
    x = 1,178.97

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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.