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Finding the Fourth Proportional to 284,115.59, 392,081.66 and 155,055.05

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Solution

The fourth proportional to 284,115.59, 392,081.66 and 155,055.05 is: 213,977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,115.59 : 392,081.66 = 155,055.05 : x
  2. Step 2: Convert to fraction form
    284,115.59/392,081.66 = 155,055.05/x
  3. Step 3: Cross multiply
    284,115.59x = 392,081.66 × 155,055.05
  4. Step 4: Simplify right side
    284,115.59x = 60,794,238,659.70
  5. Step 5: Solve for x
    x = 60,794,238,659.70/284,115.59
  6. Step 6: Final answer
    x = 213,977.13

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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.