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Finding the Fourth Proportional to 666.67, 920.83 and 471.06

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Solution

The fourth proportional to 666.67, 920.83 and 471.06 is: 650.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.67 : 920.83 = 471.06 : x
  2. Step 2: Convert to fraction form
    666.67/920.83 = 471.06/x
  3. Step 3: Cross multiply
    666.67x = 920.83 × 471.06
  4. Step 4: Simplify right side
    666.67x = 433,761.58
  5. Step 5: Solve for x
    x = 433,761.58/666.67
  6. Step 6: Final answer
    x = 650.64

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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.