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Finding the Fourth Proportional to 283,264.70, 390,904.99 and 155,940.39

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Solution

The fourth proportional to 283,264.70, 390,904.99 and 155,940.39 is: 215,197.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,264.70 : 390,904.99 = 155,940.39 : x
  2. Step 2: Convert to fraction form
    283,264.70/390,904.99 = 155,940.39/x
  3. Step 3: Cross multiply
    283,264.70x = 390,904.99 × 155,940.39
  4. Step 4: Simplify right side
    283,264.70x = 60,957,876,203.70
  5. Step 5: Solve for x
    x = 60,957,876,203.70/283,264.70
  6. Step 6: Final answer
    x = 215,197.58

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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.