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Finding the Fourth Proportional to 716,879.16, 989,257.86 and 394,617.42

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Solution

The fourth proportional to 716,879.16, 989,257.86 and 394,617.42 is: 544,552.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,879.16 : 989,257.86 = 394,617.42 : x
  2. Step 2: Convert to fraction form
    716,879.16/989,257.86 = 394,617.42/x
  3. Step 3: Cross multiply
    716,879.16x = 989,257.86 × 394,617.42
  4. Step 4: Simplify right side
    716,879.16x = 390,378,384,427.92
  5. Step 5: Solve for x
    x = 390,378,384,427.92/716,879.16
  6. Step 6: Final answer
    x = 544,552.56

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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.