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Finding the Fourth Proportional to 908.77, 1,361.89 and 475.06

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Solution

The fourth proportional to 908.77, 1,361.89 and 475.06 is: 711.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.77 : 1,361.89 = 475.06 : x
  2. Step 2: Convert to fraction form
    908.77/1,361.89 = 475.06/x
  3. Step 3: Cross multiply
    908.77x = 1,361.89 × 475.06
  4. Step 4: Simplify right side
    908.77x = 646,979.46
  5. Step 5: Solve for x
    x = 646,979.46/908.77
  6. Step 6: Final answer
    x = 711.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.