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Finding the Fourth Proportional to 279,975.60, 420,400.80 and 161,877.60

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Solution

The fourth proportional to 279,975.60, 420,400.80 and 161,877.60 is: 243,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,975.60 : 420,400.80 = 161,877.60 : x
  2. Step 2: Convert to fraction form
    279,975.60/420,400.80 = 161,877.60/x
  3. Step 3: Cross multiply
    279,975.60x = 420,400.80 × 161,877.60
  4. Step 4: Simplify right side
    279,975.60x = 68,053,472,542.08
  5. Step 5: Solve for x
    x = 68,053,472,542.08/279,975.60
  6. Step 6: Final answer
    x = 243,069.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.