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Finding the Fourth Proportional to 1,293,321.67, 1,784,784.46 and 749,772.58

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Solution

The fourth proportional to 1,293,321.67, 1,784,784.46 and 749,772.58 is: 1,034,686.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,321.67 : 1,784,784.46 = 749,772.58 : x
  2. Step 2: Convert to fraction form
    1,293,321.67/1,784,784.46 = 749,772.58/x
  3. Step 3: Cross multiply
    1,293,321.67x = 1,784,784.46 × 749,772.58
  4. Step 4: Simplify right side
    1,293,321.67x = 1,338,182,438,519.75
  5. Step 5: Solve for x
    x = 1,338,182,438,519.75/1,293,321.67
  6. Step 6: Final answer
    x = 1,034,686.48

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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.