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Finding the Fourth Proportional to 283,186.68, 390,794.64 and 155,859.54

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Solution

The fourth proportional to 283,186.68, 390,794.64 and 155,859.54 is: 215,084.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,186.68 : 390,794.64 = 155,859.54 : x
  2. Step 2: Convert to fraction form
    283,186.68/390,794.64 = 155,859.54/x
  3. Step 3: Cross multiply
    283,186.68x = 390,794.64 × 155,859.54
  4. Step 4: Simplify right side
    283,186.68x = 60,909,072,824.87
  5. Step 5: Solve for x
    x = 60,909,072,824.87/283,186.68
  6. Step 6: Final answer
    x = 215,084.53

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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.