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Finding the Fourth Proportional to 666.37, 918.90 and 573.42

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Solution

The fourth proportional to 666.37, 918.90 and 573.42 is: 790.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.37 : 918.90 = 573.42 : x
  2. Step 2: Convert to fraction form
    666.37/918.90 = 573.42/x
  3. Step 3: Cross multiply
    666.37x = 918.90 × 573.42
  4. Step 4: Simplify right side
    666.37x = 526,915.64
  5. Step 5: Solve for x
    x = 526,915.64/666.37
  6. Step 6: Final answer
    x = 790.73

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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.