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Finding the Fourth Proportional to 342,986.43, 514,665.54 and 143,324.40

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Solution

The fourth proportional to 342,986.43, 514,665.54 and 143,324.40 is: 215,064.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,986.43 : 514,665.54 = 143,324.40 : x
  2. Step 2: Convert to fraction form
    342,986.43/514,665.54 = 143,324.40/x
  3. Step 3: Cross multiply
    342,986.43x = 514,665.54 × 143,324.40
  4. Step 4: Simplify right side
    342,986.43x = 73,764,129,721.18
  5. Step 5: Solve for x
    x = 73,764,129,721.18/342,986.43
  6. Step 6: Final answer
    x = 215,064.28

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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.