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Finding the Fourth Proportional to 280,642.26, 387,171.63 and 207,230.58

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Solution

The fourth proportional to 280,642.26, 387,171.63 and 207,230.58 is: 285,893.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,642.26 : 387,171.63 = 207,230.58 : x
  2. Step 2: Convert to fraction form
    280,642.26/387,171.63 = 207,230.58/x
  3. Step 3: Cross multiply
    280,642.26x = 387,171.63 × 207,230.58
  4. Step 4: Simplify right side
    280,642.26x = 80,233,801,444.45
  5. Step 5: Solve for x
    x = 80,233,801,444.45/280,642.26
  6. Step 6: Final answer
    x = 285,893.51

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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.