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Finding the Fourth Proportional to 505,426.60, 697,478.34 and 275,990.86

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Solution

The fourth proportional to 505,426.60, 697,478.34 and 275,990.86 is: 380,861.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,426.60 : 697,478.34 = 275,990.86 : x
  2. Step 2: Convert to fraction form
    505,426.60/697,478.34 = 275,990.86/x
  3. Step 3: Cross multiply
    505,426.60x = 697,478.34 × 275,990.86
  4. Step 4: Simplify right side
    505,426.60x = 192,497,646,887.97
  5. Step 5: Solve for x
    x = 192,497,646,887.97/505,426.60
  6. Step 6: Final answer
    x = 380,861.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.