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Finding the Fourth Proportional to 479,642.61, 661,908.23 and 261,851.63

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Solution

The fourth proportional to 479,642.61, 661,908.23 and 261,851.63 is: 361,356.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,642.61 : 661,908.23 = 261,851.63 : x
  2. Step 2: Convert to fraction form
    479,642.61/661,908.23 = 261,851.63/x
  3. Step 3: Cross multiply
    479,642.61x = 661,908.23 × 261,851.63
  4. Step 4: Simplify right side
    479,642.61x = 173,321,744,317.12
  5. Step 5: Solve for x
    x = 173,321,744,317.12/479,642.61
  6. Step 6: Final answer
    x = 361,356.02

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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.