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Finding the Fourth Proportional to 1,431,873.32, 1,975,932.04 and 787,255.16

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Solution

The fourth proportional to 1,431,873.32, 1,975,932.04 and 787,255.16 is: 1,086,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,873.32 : 1,975,932.04 = 787,255.16 : x
  2. Step 2: Convert to fraction form
    1,431,873.32/1,975,932.04 = 787,255.16/x
  3. Step 3: Cross multiply
    1,431,873.32x = 1,975,932.04 × 787,255.16
  4. Step 4: Simplify right side
    1,431,873.32x = 1,555,562,694,299.33
  5. Step 5: Solve for x
    x = 1,555,562,694,299.33/1,431,873.32
  6. Step 6: Final answer
    x = 1,086,382.90

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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.