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Finding the Fourth Proportional to 1,259,815.86, 1,738,470.93 and 715,876.15

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Solution

The fourth proportional to 1,259,815.86, 1,738,470.93 and 715,876.15 is: 987,866.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,815.86 : 1,738,470.93 = 715,876.15 : x
  2. Step 2: Convert to fraction form
    1,259,815.86/1,738,470.93 = 715,876.15/x
  3. Step 3: Cross multiply
    1,259,815.86x = 1,738,470.93 × 715,876.15
  4. Step 4: Simplify right side
    1,259,815.86x = 1,244,529,876,255.32
  5. Step 5: Solve for x
    x = 1,244,529,876,255.32/1,259,815.86
  6. Step 6: Final answer
    x = 987,866.49

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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.