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Finding the Fourth Proportional to 278,051.80, 417,077.70 and 172,816.60

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Solution

The fourth proportional to 278,051.80, 417,077.70 and 172,816.60 is: 259,224.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,051.80 : 417,077.70 = 172,816.60 : x
  2. Step 2: Convert to fraction form
    278,051.80/417,077.70 = 172,816.60/x
  3. Step 3: Cross multiply
    278,051.80x = 417,077.70 × 172,816.60
  4. Step 4: Simplify right side
    278,051.80x = 72,077,950,049.82
  5. Step 5: Solve for x
    x = 72,077,950,049.82/278,051.80
  6. Step 6: Final answer
    x = 259,224.90

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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.