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Finding the Fourth Proportional to 287,680.75, 397,169.69 and 255,761.49

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Solution

The fourth proportional to 287,680.75, 397,169.69 and 255,761.49 is: 353,102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,680.75 : 397,169.69 = 255,761.49 : x
  2. Step 2: Convert to fraction form
    287,680.75/397,169.69 = 255,761.49/x
  3. Step 3: Cross multiply
    287,680.75x = 397,169.69 × 255,761.49
  4. Step 4: Simplify right side
    287,680.75x = 101,580,711,697.24
  5. Step 5: Solve for x
    x = 101,580,711,697.24/287,680.75
  6. Step 6: Final answer
    x = 353,102.22

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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.