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Finding the Fourth Proportional to 1,440,327.86, 1,987,628.94 and 786,939.82

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Solution

The fourth proportional to 1,440,327.86, 1,987,628.94 and 786,939.82 is: 1,085,964.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440,327.86 : 1,987,628.94 = 786,939.82 : x
  2. Step 2: Convert to fraction form
    1,440,327.86/1,987,628.94 = 786,939.82/x
  3. Step 3: Cross multiply
    1,440,327.86x = 1,987,628.94 × 786,939.82
  4. Step 4: Simplify right side
    1,440,327.86x = 1,564,144,365,743.98
  5. Step 5: Solve for x
    x = 1,564,144,365,743.98/1,440,327.86
  6. Step 6: Final answer
    x = 1,085,964.11

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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.