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Finding the Fourth Proportional to 490,718.40, 738,045.90 and 439,542.60

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Solution

The fourth proportional to 490,718.40, 738,045.90 and 439,542.60 is: 661,076.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,718.40 : 738,045.90 = 439,542.60 : x
  2. Step 2: Convert to fraction form
    490,718.40/738,045.90 = 439,542.60/x
  3. Step 3: Cross multiply
    490,718.40x = 738,045.90 × 439,542.60
  4. Step 4: Simplify right side
    490,718.40x = 324,402,613,805.34
  5. Step 5: Solve for x
    x = 324,402,613,805.34/490,718.40
  6. Step 6: Final answer
    x = 661,076.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.