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Finding the Fourth Proportional to 280,478.73, 389,673.57 and 277,115.71

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Solution

The fourth proportional to 280,478.73, 389,673.57 and 277,115.71 is: 385,001.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,478.73 : 389,673.57 = 277,115.71 : x
  2. Step 2: Convert to fraction form
    280,478.73/389,673.57 = 277,115.71/x
  3. Step 3: Cross multiply
    280,478.73x = 389,673.57 × 277,115.71
  4. Step 4: Simplify right side
    280,478.73x = 107,984,668,018.79
  5. Step 5: Solve for x
    x = 107,984,668,018.79/280,478.73
  6. Step 6: Final answer
    x = 385,001.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.