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Finding the Fourth Proportional to 283,245.46, 390,892.78 and 155,919.70

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Solution

The fourth proportional to 283,245.46, 390,892.78 and 155,919.70 is: 215,176.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,245.46 : 390,892.78 = 155,919.70 : x
  2. Step 2: Convert to fraction form
    283,245.46/390,892.78 = 155,919.70/x
  3. Step 3: Cross multiply
    283,245.46x = 390,892.78 × 155,919.70
  4. Step 4: Simplify right side
    283,245.46x = 60,947,884,989.77
  5. Step 5: Solve for x
    x = 60,947,884,989.77/283,245.46
  6. Step 6: Final answer
    x = 215,176.92

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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.