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Finding the Fourth Proportional to 849.98, 1,172.72 and 653.15

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Solution

The fourth proportional to 849.98, 1,172.72 and 653.15 is: 901.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.98 : 1,172.72 = 653.15 : x
  2. Step 2: Convert to fraction form
    849.98/1,172.72 = 653.15/x
  3. Step 3: Cross multiply
    849.98x = 1,172.72 × 653.15
  4. Step 4: Simplify right side
    849.98x = 765,952.94
  5. Step 5: Solve for x
    x = 765,952.94/849.98
  6. Step 6: Final answer
    x = 901.15

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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.