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Finding the Fourth Proportional to 280,423.76, 387,029.22 and 178,342.79

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Solution

The fourth proportional to 280,423.76, 387,029.22 and 178,342.79 is: 246,141.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,423.76 : 387,029.22 = 178,342.79 : x
  2. Step 2: Convert to fraction form
    280,423.76/387,029.22 = 178,342.79/x
  3. Step 3: Cross multiply
    280,423.76x = 387,029.22 × 178,342.79
  4. Step 4: Simplify right side
    280,423.76x = 69,023,870,906.32
  5. Step 5: Solve for x
    x = 69,023,870,906.32/280,423.76
  6. Step 6: Final answer
    x = 246,141.31

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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.