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Finding the Fourth Proportional to 280,638.57, 387,166.53 and 207,226.90

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Solution

The fourth proportional to 280,638.57, 387,166.53 and 207,226.90 is: 285,888.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,638.57 : 387,166.53 = 207,226.90 : x
  2. Step 2: Convert to fraction form
    280,638.57/387,166.53 = 207,226.90/x
  3. Step 3: Cross multiply
    280,638.57x = 387,166.53 × 207,226.90
  4. Step 4: Simplify right side
    280,638.57x = 80,231,319,795.66
  5. Step 5: Solve for x
    x = 80,231,319,795.66/280,638.57
  6. Step 6: Final answer
    x = 285,888.43

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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.