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Finding the Fourth Proportional to 716,345.72, 988,559.37 and 394,080.32

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Solution

The fourth proportional to 716,345.72, 988,559.37 and 394,080.32 is: 543,832.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,345.72 : 988,559.37 = 394,080.32 : x
  2. Step 2: Convert to fraction form
    716,345.72/988,559.37 = 394,080.32/x
  3. Step 3: Cross multiply
    716,345.72x = 988,559.37 × 394,080.32
  4. Step 4: Simplify right side
    716,345.72x = 389,571,792,868.60
  5. Step 5: Solve for x
    x = 389,571,792,868.60/716,345.72
  6. Step 6: Final answer
    x = 543,832.09

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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.