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Finding the Fourth Proportional to 1,248,945.72, 1,723,586.81 and 765,417.44

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Solution

The fourth proportional to 1,248,945.72, 1,723,586.81 and 765,417.44 is: 1,056,301.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,945.72 : 1,723,586.81 = 765,417.44 : x
  2. Step 2: Convert to fraction form
    1,248,945.72/1,723,586.81 = 765,417.44/x
  3. Step 3: Cross multiply
    1,248,945.72x = 1,723,586.81 × 765,417.44
  4. Step 4: Simplify right side
    1,248,945.72x = 1,319,263,403,727.97
  5. Step 5: Solve for x
    x = 1,319,263,403,727.97/1,248,945.72
  6. Step 6: Final answer
    x = 1,056,301.63

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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.