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Finding the Fourth Proportional to 381,965.12, 570,143.92 and 353,816

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Solution

The fourth proportional to 381,965.12, 570,143.92 and 353,816 is: 528,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,965.12 : 570,143.92 = 353,816 : x
  2. Step 2: Convert to fraction form
    381,965.12/570,143.92 = 353,816/x
  3. Step 3: Cross multiply
    381,965.12x = 570,143.92 × 353,816
  4. Step 4: Simplify right side
    381,965.12x = 201,726,041,198.72
  5. Step 5: Solve for x
    x = 201,726,041,198.72/381,965.12
  6. Step 6: Final answer
    x = 528,126.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.