Home / 1,553.14-2,143.20-854.47

Finding the Fourth Proportional to 1,553.14, 2,143.20 and 854.47

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Solution

The fourth proportional to 1,553.14, 2,143.20 and 854.47 is: 1,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.14 : 2,143.20 = 854.47 : x
  2. Step 2: Convert to fraction form
    1,553.14/2,143.20 = 854.47/x
  3. Step 3: Cross multiply
    1,553.14x = 2,143.20 × 854.47
  4. Step 4: Simplify right side
    1,553.14x = 1,831,300.10
  5. Step 5: Solve for x
    x = 1,831,300.10/1,553.14
  6. Step 6: Final answer
    x = 1,179.10

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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.