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Finding the Fourth Proportional to 490,526.27, 676,504.72 and 318,274.50

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Solution

The fourth proportional to 490,526.27, 676,504.72 and 318,274.50 is: 438,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,526.27 : 676,504.72 = 318,274.50 : x
  2. Step 2: Convert to fraction form
    490,526.27/676,504.72 = 318,274.50/x
  3. Step 3: Cross multiply
    490,526.27x = 676,504.72 × 318,274.50
  4. Step 4: Simplify right side
    490,526.27x = 215,314,201,505.64
  5. Step 5: Solve for x
    x = 215,314,201,505.64/490,526.27
  6. Step 6: Final answer
    x = 438,945.30

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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.