Home / 1,553.34-2,143.09-1,055.12

Finding the Fourth Proportional to 1,553.34, 2,143.09 and 1,055.12

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Solution

The fourth proportional to 1,553.34, 2,143.09 and 1,055.12 is: 1,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.34 : 2,143.09 = 1,055.12 : x
  2. Step 2: Convert to fraction form
    1,553.34/2,143.09 = 1,055.12/x
  3. Step 3: Cross multiply
    1,553.34x = 2,143.09 × 1,055.12
  4. Step 4: Simplify right side
    1,553.34x = 2,261,217.12
  5. Step 5: Solve for x
    x = 2,261,217.12/1,553.34
  6. Step 6: Final answer
    x = 1,455.71

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Double scale
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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.