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Finding the Fourth Proportional to 849.96, 1,172.31 and 717.93

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Solution

The fourth proportional to 849.96, 1,172.31 and 717.93 is: 990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.96 : 1,172.31 = 717.93 : x
  2. Step 2: Convert to fraction form
    849.96/1,172.31 = 717.93/x
  3. Step 3: Cross multiply
    849.96x = 1,172.31 × 717.93
  4. Step 4: Simplify right side
    849.96x = 841,633.83
  5. Step 5: Solve for x
    x = 841,633.83/849.96
  6. Step 6: Final answer
    x = 990.20

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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.