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Finding the Fourth Proportional to 1,555.11, 2,321.24 and 1,425.24

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Solution

The fourth proportional to 1,555.11, 2,321.24 and 1,425.24 is: 2,127.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.11 : 2,321.24 = 1,425.24 : x
  2. Step 2: Convert to fraction form
    1,555.11/2,321.24 = 1,425.24/x
  3. Step 3: Cross multiply
    1,555.11x = 2,321.24 × 1,425.24
  4. Step 4: Simplify right side
    1,555.11x = 3,308,316.97
  5. Step 5: Solve for x
    x = 3,308,316.97/1,555.11
  6. Step 6: Final answer
    x = 2,127.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.