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Finding the Fourth Proportional to 666.23, 918.50 and 573.95

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Solution

The fourth proportional to 666.23, 918.50 and 573.95 is: 791.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.23 : 918.50 = 573.95 : x
  2. Step 2: Convert to fraction form
    666.23/918.50 = 573.95/x
  3. Step 3: Cross multiply
    666.23x = 918.50 × 573.95
  4. Step 4: Simplify right side
    666.23x = 527,172.50
  5. Step 5: Solve for x
    x = 527,172.50/666.23
  6. Step 6: Final answer
    x = 791.28

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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.