Home / 1,426.71-2,140.07-386.72

Finding the Fourth Proportional to 1,426.71, 2,140.07 and 386.72

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Solution

The fourth proportional to 1,426.71, 2,140.07 and 386.72 is: 580.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.71 : 2,140.07 = 386.72 : x
  2. Step 2: Convert to fraction form
    1,426.71/2,140.07 = 386.72/x
  3. Step 3: Cross multiply
    1,426.71x = 2,140.07 × 386.72
  4. Step 4: Simplify right side
    1,426.71x = 827,599.42
  5. Step 5: Solve for x
    x = 827,599.42/1,426.71
  6. Step 6: Final answer
    x = 580.07

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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.