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Finding the Fourth Proportional to 666.66, 923.70 and 651.54

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Solution

The fourth proportional to 666.66, 923.70 and 651.54 is: 902.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.66 : 923.70 = 651.54 : x
  2. Step 2: Convert to fraction form
    666.66/923.70 = 651.54/x
  3. Step 3: Cross multiply
    666.66x = 923.70 × 651.54
  4. Step 4: Simplify right side
    666.66x = 601,827.50
  5. Step 5: Solve for x
    x = 601,827.50/666.66
  6. Step 6: Final answer
    x = 902.75

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.