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Finding the Fourth Proportional to 315,337.17, 435,639.21 and 206,699.37

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Solution

The fourth proportional to 315,337.17, 435,639.21 and 206,699.37 is: 285,555.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,337.17 : 435,639.21 = 206,699.37 : x
  2. Step 2: Convert to fraction form
    315,337.17/435,639.21 = 206,699.37/x
  3. Step 3: Cross multiply
    315,337.17x = 435,639.21 × 206,699.37
  4. Step 4: Simplify right side
    315,337.17x = 90,046,350,254.30
  5. Step 5: Solve for x
    x = 90,046,350,254.30/315,337.17
  6. Step 6: Final answer
    x = 285,555.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.