Home / 1,555.16-2,145.40-995.36

Finding the Fourth Proportional to 1,555.16, 2,145.40 and 995.36

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Solution

The fourth proportional to 1,555.16, 2,145.40 and 995.36 is: 1,373.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.16 : 2,145.40 = 995.36 : x
  2. Step 2: Convert to fraction form
    1,555.16/2,145.40 = 995.36/x
  3. Step 3: Cross multiply
    1,555.16x = 2,145.40 × 995.36
  4. Step 4: Simplify right side
    1,555.16x = 2,135,432.13
  5. Step 5: Solve for x
    x = 2,135,432.13/1,555.16
  6. Step 6: Final answer
    x = 1,373.13

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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.