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Finding the Fourth Proportional to 849.56, 1,172.36 and 476.60

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Solution

The fourth proportional to 849.56, 1,172.36 and 476.60 is: 657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.56 : 1,172.36 = 476.60 : x
  2. Step 2: Convert to fraction form
    849.56/1,172.36 = 476.60/x
  3. Step 3: Cross multiply
    849.56x = 1,172.36 × 476.60
  4. Step 4: Simplify right side
    849.56x = 558,746.78
  5. Step 5: Solve for x
    x = 558,746.78/849.56
  6. Step 6: Final answer
    x = 657.69

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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.