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Finding the Fourth Proportional to 691,488.65, 954,317.31 and 419,625.72

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Solution

The fourth proportional to 691,488.65, 954,317.31 and 419,625.72 is: 579,121.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,488.65 : 954,317.31 = 419,625.72 : x
  2. Step 2: Convert to fraction form
    691,488.65/954,317.31 = 419,625.72/x
  3. Step 3: Cross multiply
    691,488.65x = 954,317.31 × 419,625.72
  4. Step 4: Simplify right side
    691,488.65x = 400,456,088,317.21
  5. Step 5: Solve for x
    x = 400,456,088,317.21/691,488.65
  6. Step 6: Final answer
    x = 579,121.71

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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.