Home / 3,145.47-4,340.91-1,729.23

Finding the Fourth Proportional to 3,145.47, 4,340.91 and 1,729.23

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Solution

The fourth proportional to 3,145.47, 4,340.91 and 1,729.23 is: 2,386.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.47 : 4,340.91 = 1,729.23 : x
  2. Step 2: Convert to fraction form
    3,145.47/4,340.91 = 1,729.23/x
  3. Step 3: Cross multiply
    3,145.47x = 4,340.91 × 1,729.23
  4. Step 4: Simplify right side
    3,145.47x = 7,506,431.80
  5. Step 5: Solve for x
    x = 7,506,431.80/3,145.47
  6. Step 6: Final answer
    x = 2,386.43

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Half 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.