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Finding the Fourth Proportional to 280,179.95, 386,646.50 and 159,321.25

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Solution

The fourth proportional to 280,179.95, 386,646.50 and 159,321.25 is: 219,862.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,179.95 : 386,646.50 = 159,321.25 : x
  2. Step 2: Convert to fraction form
    280,179.95/386,646.50 = 159,321.25/x
  3. Step 3: Cross multiply
    280,179.95x = 386,646.50 × 159,321.25
  4. Step 4: Simplify right side
    280,179.95x = 61,601,000,958.29
  5. Step 5: Solve for x
    x = 61,601,000,958.29/280,179.95
  6. Step 6: Final answer
    x = 219,862.27

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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.