Home / 1,686.24-2,316.96-1,375.20

Finding the Fourth Proportional to 1,686.24, 2,316.96 and 1,375.20

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Solution

The fourth proportional to 1,686.24, 2,316.96 and 1,375.20 is: 1,889.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.24 : 2,316.96 = 1,375.20 : x
  2. Step 2: Convert to fraction form
    1,686.24/2,316.96 = 1,375.20/x
  3. Step 3: Cross multiply
    1,686.24x = 2,316.96 × 1,375.20
  4. Step 4: Simplify right side
    1,686.24x = 3,186,283.39
  5. Step 5: Solve for x
    x = 3,186,283.39/1,686.24
  6. Step 6: Final answer
    x = 1,889.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.