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Finding the Fourth Proportional to 1,269.41, 1,904.13 and 447.66

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Solution

The fourth proportional to 1,269.41, 1,904.13 and 447.66 is: 671.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.41 : 1,904.13 = 447.66 : x
  2. Step 2: Convert to fraction form
    1,269.41/1,904.13 = 447.66/x
  3. Step 3: Cross multiply
    1,269.41x = 1,904.13 × 447.66
  4. Step 4: Simplify right side
    1,269.41x = 852,402.84
  5. Step 5: Solve for x
    x = 852,402.84/1,269.41
  6. Step 6: Final answer
    x = 671.50

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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.