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Finding the Fourth Proportional to 716,464.98, 988,721.64 and 394,168.16

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Solution

The fourth proportional to 716,464.98, 988,721.64 and 394,168.16 is: 543,952.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,464.98 : 988,721.64 = 394,168.16 : x
  2. Step 2: Convert to fraction form
    716,464.98/988,721.64 = 394,168.16/x
  3. Step 3: Cross multiply
    716,464.98x = 988,721.64 × 394,168.16
  4. Step 4: Simplify right side
    716,464.98x = 389,722,582,676.53
  5. Step 5: Solve for x
    x = 389,722,582,676.53/716,464.98
  6. Step 6: Final answer
    x = 543,952.03

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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.