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Finding the Fourth Proportional to 1,272,578.34, 1,755,975.41 and 748,977.64

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Solution

The fourth proportional to 1,272,578.34, 1,755,975.41 and 748,977.64 is: 1,033,481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,578.34 : 1,755,975.41 = 748,977.64 : x
  2. Step 2: Convert to fraction form
    1,272,578.34/1,755,975.41 = 748,977.64/x
  3. Step 3: Cross multiply
    1,272,578.34x = 1,755,975.41 × 748,977.64
  4. Step 4: Simplify right side
    1,272,578.34x = 1,315,186,313,153.67
  5. Step 5: Solve for x
    x = 1,315,186,313,153.67/1,272,578.34
  6. Step 6: Final answer
    x = 1,033,481.61

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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.