Home / 3,101.40-4,655.70-1,786.20

Finding the Fourth Proportional to 3,101.40, 4,655.70 and 1,786.20

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Solution

The fourth proportional to 3,101.40, 4,655.70 and 1,786.20 is: 2,681.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.40 : 4,655.70 = 1,786.20 : x
  2. Step 2: Convert to fraction form
    3,101.40/4,655.70 = 1,786.20/x
  3. Step 3: Cross multiply
    3,101.40x = 4,655.70 × 1,786.20
  4. Step 4: Simplify right side
    3,101.40x = 8,316,011.34
  5. Step 5: Solve for x
    x = 8,316,011.34/3,101.40
  6. Step 6: Final answer
    x = 2,681.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.