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Finding the Fourth Proportional to 508,378.60, 701,538.78 and 278,930.71

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Solution

The fourth proportional to 508,378.60, 701,538.78 and 278,930.71 is: 384,911.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,378.60 : 701,538.78 = 278,930.71 : x
  2. Step 2: Convert to fraction form
    508,378.60/701,538.78 = 278,930.71/x
  3. Step 3: Cross multiply
    508,378.60x = 701,538.78 × 278,930.71
  4. Step 4: Simplify right side
    508,378.60x = 195,680,711,920.85
  5. Step 5: Solve for x
    x = 195,680,711,920.85/508,378.60
  6. Step 6: Final answer
    x = 384,911.39

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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.