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Finding the Fourth Proportional to 1,554.89, 2,145.11 and 995.18

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Solution

The fourth proportional to 1,554.89, 2,145.11 and 995.18 is: 1,372.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.89 : 2,145.11 = 995.18 : x
  2. Step 2: Convert to fraction form
    1,554.89/2,145.11 = 995.18/x
  3. Step 3: Cross multiply
    1,554.89x = 2,145.11 × 995.18
  4. Step 4: Simplify right side
    1,554.89x = 2,134,754.87
  5. Step 5: Solve for x
    x = 2,134,754.87/1,554.89
  6. Step 6: Final answer
    x = 1,372.93

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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.