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Finding the Fourth Proportional to 283,091.72, 390,656.82 and 155,755.40

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Solution

The fourth proportional to 283,091.72, 390,656.82 and 155,755.40 is: 214,937.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,091.72 : 390,656.82 = 155,755.40 : x
  2. Step 2: Convert to fraction form
    283,091.72/390,656.82 = 155,755.40/x
  3. Step 3: Cross multiply
    283,091.72x = 390,656.82 × 155,755.40
  4. Step 4: Simplify right side
    283,091.72x = 60,846,909,261.83
  5. Step 5: Solve for x
    x = 60,846,909,261.83/283,091.72
  6. Step 6: Final answer
    x = 214,937.09

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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.