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Finding the Fourth Proportional to 490,326, 676,200.60 and 318,064.56

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Solution

The fourth proportional to 490,326, 676,200.60 and 318,064.56 is: 438,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,326 : 676,200.60 = 318,064.56 : x
  2. Step 2: Convert to fraction form
    490,326/676,200.60 = 318,064.56/x
  3. Step 3: Cross multiply
    490,326x = 676,200.60 × 318,064.56
  4. Step 4: Simplify right side
    490,326x = 215,075,446,310.74
  5. Step 5: Solve for x
    x = 215,075,446,310.74/490,326
  6. Step 6: Final answer
    x = 438,637.65

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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.