Home / 1,426.87-2,140.10-386.97

Finding the Fourth Proportional to 1,426.87, 2,140.10 and 386.97

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Solution

The fourth proportional to 1,426.87, 2,140.10 and 386.97 is: 580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.87 : 2,140.10 = 386.97 : x
  2. Step 2: Convert to fraction form
    1,426.87/2,140.10 = 386.97/x
  3. Step 3: Cross multiply
    1,426.87x = 2,140.10 × 386.97
  4. Step 4: Simplify right side
    1,426.87x = 828,154.50
  5. Step 5: Solve for x
    x = 828,154.50/1,426.87
  6. Step 6: Final answer
    x = 580.40

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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.