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Finding the Fourth Proportional to 1,426.76, 2,140.34 and 502.21

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Solution

The fourth proportional to 1,426.76, 2,140.34 and 502.21 is: 753.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.76 : 2,140.34 = 502.21 : x
  2. Step 2: Convert to fraction form
    1,426.76/2,140.34 = 502.21/x
  3. Step 3: Cross multiply
    1,426.76x = 2,140.34 × 502.21
  4. Step 4: Simplify right side
    1,426.76x = 1,074,892.29
  5. Step 5: Solve for x
    x = 1,074,892.29/1,426.76
  6. Step 6: Final answer
    x = 753.38

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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.