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Finding the Fourth Proportional to 279,775.88, 386,078.60 and 158,916.80

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Solution

The fourth proportional to 279,775.88, 386,078.60 and 158,916.80 is: 219,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,775.88 : 386,078.60 = 158,916.80 : x
  2. Step 2: Convert to fraction form
    279,775.88/386,078.60 = 158,916.80/x
  3. Step 3: Cross multiply
    279,775.88x = 386,078.60 × 158,916.80
  4. Step 4: Simplify right side
    279,775.88x = 61,354,375,660.48
  5. Step 5: Solve for x
    x = 61,354,375,660.48/279,775.88
  6. Step 6: Final answer
    x = 219,298.30

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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.