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Finding the Fourth Proportional to 278,392.59, 384,176.43 and 157,531.68

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Solution

The fourth proportional to 278,392.59, 384,176.43 and 157,531.68 is: 217,390.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,392.59 : 384,176.43 = 157,531.68 : x
  2. Step 2: Convert to fraction form
    278,392.59/384,176.43 = 157,531.68/x
  3. Step 3: Cross multiply
    278,392.59x = 384,176.43 × 157,531.68
  4. Step 4: Simplify right side
    278,392.59x = 60,519,958,434.30
  5. Step 5: Solve for x
    x = 60,519,958,434.30/278,392.59
  6. Step 6: Final answer
    x = 217,390.69

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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.