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Finding the Fourth Proportional to 1,297,932.21, 1,791,639.09 and 976,576.47

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Solution

The fourth proportional to 1,297,932.21, 1,791,639.09 and 976,576.47 is: 1,348,046.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,932.21 : 1,791,639.09 = 976,576.47 : x
  2. Step 2: Convert to fraction form
    1,297,932.21/1,791,639.09 = 976,576.47/x
  3. Step 3: Cross multiply
    1,297,932.21x = 1,791,639.09 × 976,576.47
  4. Step 4: Simplify right side
    1,297,932.21x = 1,749,672,578,026.21
  5. Step 5: Solve for x
    x = 1,749,672,578,026.21/1,297,932.21
  6. Step 6: Final answer
    x = 1,348,046.20

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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.