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Finding the Fourth Proportional to 280,109.20, 420,163.80 and 230,901.70

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Solution

The fourth proportional to 280,109.20, 420,163.80 and 230,901.70 is: 346,352.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,109.20 : 420,163.80 = 230,901.70 : x
  2. Step 2: Convert to fraction form
    280,109.20/420,163.80 = 230,901.70/x
  3. Step 3: Cross multiply
    280,109.20x = 420,163.80 × 230,901.70
  4. Step 4: Simplify right side
    280,109.20x = 97,016,535,698.46
  5. Step 5: Solve for x
    x = 97,016,535,698.46/280,109.20
  6. Step 6: Final answer
    x = 346,352.55

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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.