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Finding the Fourth Proportional to 1,245,707.18, 1,869,723.18 and 638,951.03

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Solution

The fourth proportional to 1,245,707.18, 1,869,723.18 and 638,951.03 is: 959,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,707.18 : 1,869,723.18 = 638,951.03 : x
  2. Step 2: Convert to fraction form
    1,245,707.18/1,869,723.18 = 638,951.03/x
  3. Step 3: Cross multiply
    1,245,707.18x = 1,869,723.18 × 638,951.03
  4. Step 4: Simplify right side
    1,245,707.18x = 1,194,661,558,058.86
  5. Step 5: Solve for x
    x = 1,194,661,558,058.86/1,245,707.18
  6. Step 6: Final answer
    x = 959,022.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.