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Finding the Fourth Proportional to 275,212.80, 412,430.40 and 169,718.40

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Solution

The fourth proportional to 275,212.80, 412,430.40 and 169,718.40 is: 254,337.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,212.80 : 412,430.40 = 169,718.40 : x
  2. Step 2: Convert to fraction form
    275,212.80/412,430.40 = 169,718.40/x
  3. Step 3: Cross multiply
    275,212.80x = 412,430.40 × 169,718.40
  4. Step 4: Simplify right side
    275,212.80x = 69,997,027,599.36
  5. Step 5: Solve for x
    x = 69,997,027,599.36/275,212.80
  6. Step 6: Final answer
    x = 254,337.83

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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.