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Finding the Fourth Proportional to 283,086.72, 390,649.92 and 155,750.40

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Solution

The fourth proportional to 283,086.72, 390,649.92 and 155,750.40 is: 214,930.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,086.72 : 390,649.92 = 155,750.40 : x
  2. Step 2: Convert to fraction form
    283,086.72/390,649.92 = 155,750.40/x
  3. Step 3: Cross multiply
    283,086.72x = 390,649.92 × 155,750.40
  4. Step 4: Simplify right side
    283,086.72x = 60,843,881,299.97
  5. Step 5: Solve for x
    x = 60,843,881,299.97/283,086.72
  6. Step 6: Final answer
    x = 214,930.19

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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.