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Finding the Fourth Proportional to 312,910.80, 469,366.20 and 312,910.80

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Solution

The fourth proportional to 312,910.80, 469,366.20 and 312,910.80 is: 469,366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,910.80 : 469,366.20 = 312,910.80 : x
  2. Step 2: Convert to fraction form
    312,910.80/469,366.20 = 312,910.80/x
  3. Step 3: Cross multiply
    312,910.80x = 469,366.20 × 312,910.80
  4. Step 4: Simplify right side
    312,910.80x = 146,869,753,134.96
  5. Step 5: Solve for x
    x = 146,869,753,134.96/312,910.80
  6. Step 6: Final answer
    x = 469,366.20

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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.