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Finding the Fourth Proportional to 1,248,939.72, 1,723,578.53 and 765,411.44

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Solution

The fourth proportional to 1,248,939.72, 1,723,578.53 and 765,411.44 is: 1,056,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,939.72 : 1,723,578.53 = 765,411.44 : x
  2. Step 2: Convert to fraction form
    1,248,939.72/1,723,578.53 = 765,411.44/x
  3. Step 3: Cross multiply
    1,248,939.72x = 1,723,578.53 × 765,411.44
  4. Step 4: Simplify right side
    1,248,939.72x = 1,319,246,712,155.43
  5. Step 5: Solve for x
    x = 1,319,246,712,155.43/1,248,939.72
  6. Step 6: Final answer
    x = 1,056,293.34

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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.