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Finding the Fourth Proportional to 490,327, 676,201.98 and 318,065.56

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Solution

The fourth proportional to 490,327, 676,201.98 and 318,065.56 is: 438,639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,327 : 676,201.98 = 318,065.56 : x
  2. Step 2: Convert to fraction form
    490,327/676,201.98 = 318,065.56/x
  3. Step 3: Cross multiply
    490,327x = 676,201.98 × 318,065.56
  4. Step 4: Simplify right side
    490,327x = 215,076,561,441.81
  5. Step 5: Solve for x
    x = 215,076,561,441.81/490,327
  6. Step 6: Final answer
    x = 438,639.03

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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.