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Finding the Fourth Proportional to 651.30, 976.95 and 266.55

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Solution

The fourth proportional to 651.30, 976.95 and 266.55 is: 399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.30 : 976.95 = 266.55 : x
  2. Step 2: Convert to fraction form
    651.30/976.95 = 266.55/x
  3. Step 3: Cross multiply
    651.30x = 976.95 × 266.55
  4. Step 4: Simplify right side
    651.30x = 260,399.81
  5. Step 5: Solve for x
    x = 260,399.81/651.30
  6. Step 6: Final answer
    x = 399.82

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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.