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Finding the Fourth Proportional to 490,417, 731,333.87 and 485,932.78

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Solution

The fourth proportional to 490,417, 731,333.87 and 485,932.78 is: 724,646.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,417 : 731,333.87 = 485,932.78 : x
  2. Step 2: Convert to fraction form
    490,417/731,333.87 = 485,932.78/x
  3. Step 3: Cross multiply
    490,417x = 731,333.87 × 485,932.78
  4. Step 4: Simplify right side
    490,417x = 355,379,100,557.26
  5. Step 5: Solve for x
    x = 355,379,100,557.26/490,417
  6. Step 6: Final answer
    x = 724,646.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.