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Finding the Fourth Proportional to 283,171.62, 390,779.60 and 155,850.15

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Solution

The fourth proportional to 283,171.62, 390,779.60 and 155,850.15 is: 215,074.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,171.62 : 390,779.60 = 155,850.15 : x
  2. Step 2: Convert to fraction form
    283,171.62/390,779.60 = 155,850.15/x
  3. Step 3: Cross multiply
    283,171.62x = 390,779.60 × 155,850.15
  4. Step 4: Simplify right side
    283,171.62x = 60,903,058,497.69
  5. Step 5: Solve for x
    x = 60,903,058,497.69/283,171.62
  6. Step 6: Final answer
    x = 215,074.73

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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.