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Finding the Fourth Proportional to 283,235.67, 390,865.41 and 155,910.42

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Solution

The fourth proportional to 283,235.67, 390,865.41 and 155,910.42 is: 215,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,235.67 : 390,865.41 = 155,910.42 : x
  2. Step 2: Convert to fraction form
    283,235.67/390,865.41 = 155,910.42/x
  3. Step 3: Cross multiply
    283,235.67x = 390,865.41 × 155,910.42
  4. Step 4: Simplify right side
    283,235.67x = 60,939,990,236.57
  5. Step 5: Solve for x
    x = 60,939,990,236.57/283,235.67
  6. Step 6: Final answer
    x = 215,156.48

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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.