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Finding the Fourth Proportional to 308,155.78, 425,385.94 and 187,335.66

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Solution

The fourth proportional to 308,155.78, 425,385.94 and 187,335.66 is: 258,602.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,155.78 : 425,385.94 = 187,335.66 : x
  2. Step 2: Convert to fraction form
    308,155.78/425,385.94 = 187,335.66/x
  3. Step 3: Cross multiply
    308,155.78x = 425,385.94 × 187,335.66
  4. Step 4: Simplify right side
    308,155.78x = 79,689,955,824.62
  5. Step 5: Solve for x
    x = 79,689,955,824.62/308,155.78
  6. Step 6: Final answer
    x = 258,602.83

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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.