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Finding the Fourth Proportional to 280,812.67, 387,520.89 and 159,953.92

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Solution

The fourth proportional to 280,812.67, 387,520.89 and 159,953.92 is: 220,736.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,812.67 : 387,520.89 = 159,953.92 : x
  2. Step 2: Convert to fraction form
    280,812.67/387,520.89 = 159,953.92/x
  3. Step 3: Cross multiply
    280,812.67x = 387,520.89 × 159,953.92
  4. Step 4: Simplify right side
    280,812.67x = 61,985,485,437.39
  5. Step 5: Solve for x
    x = 61,985,485,437.39/280,812.67
  6. Step 6: Final answer
    x = 220,736.07

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1.5x scale

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.