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Finding the Fourth Proportional to 1,384,812, 1,911,046.32 and 748,908

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Solution

The fourth proportional to 1,384,812, 1,911,046.32 and 748,908 is: 1,033,496.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384,812 : 1,911,046.32 = 748,908 : x
  2. Step 2: Convert to fraction form
    1,384,812/1,911,046.32 = 748,908/x
  3. Step 3: Cross multiply
    1,384,812x = 1,911,046.32 × 748,908
  4. Step 4: Simplify right side
    1,384,812x = 1,431,197,877,418.56
  5. Step 5: Solve for x
    x = 1,431,197,877,418.56/1,384,812
  6. Step 6: Final answer
    x = 1,033,496.16

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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.