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Finding the Fourth Proportional to 280,553.27, 420,970.68 and 130,805.28

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Solution

The fourth proportional to 280,553.27, 420,970.68 and 130,805.28 is: 196,273.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,553.27 : 420,970.68 = 130,805.28 : x
  2. Step 2: Convert to fraction form
    280,553.27/420,970.68 = 130,805.28/x
  3. Step 3: Cross multiply
    280,553.27x = 420,970.68 × 130,805.28
  4. Step 4: Simplify right side
    280,553.27x = 55,065,187,669.19
  5. Step 5: Solve for x
    x = 55,065,187,669.19/280,553.27
  6. Step 6: Final answer
    x = 196,273.56

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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.