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Finding the Fourth Proportional to 490,412, 731,326.42 and 485,927.75

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Solution

The fourth proportional to 490,412, 731,326.42 and 485,927.75 is: 724,639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,412 : 731,326.42 = 485,927.75 : x
  2. Step 2: Convert to fraction form
    490,412/731,326.42 = 485,927.75/x
  3. Step 3: Cross multiply
    490,412x = 731,326.42 × 485,927.75
  4. Step 4: Simplify right side
    490,412x = 355,371,801,786.16
  5. Step 5: Solve for x
    x = 355,371,801,786.16/490,412
  6. Step 6: Final answer
    x = 724,639.29

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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.