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Finding the Fourth Proportional to 280,908.72, 387,559.08 and 159,964.25

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Solution

The fourth proportional to 280,908.72, 387,559.08 and 159,964.25 is: 220,696.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,908.72 : 387,559.08 = 159,964.25 : x
  2. Step 2: Convert to fraction form
    280,908.72/387,559.08 = 159,964.25/x
  3. Step 3: Cross multiply
    280,908.72x = 387,559.08 × 159,964.25
  4. Step 4: Simplify right side
    280,908.72x = 61,995,595,625.09
  5. Step 5: Solve for x
    x = 61,995,595,625.09/280,908.72
  6. Step 6: Final answer
    x = 220,696.59

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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.