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Finding the Fourth Proportional to 662.95, 917.21 and 651.31

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Solution

The fourth proportional to 662.95, 917.21 and 651.31 is: 901.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.95 : 917.21 = 651.31 : x
  2. Step 2: Convert to fraction form
    662.95/917.21 = 651.31/x
  3. Step 3: Cross multiply
    662.95x = 917.21 × 651.31
  4. Step 4: Simplify right side
    662.95x = 597,388.05
  5. Step 5: Solve for x
    x = 597,388.05/662.95
  6. Step 6: Final answer
    x = 901.11

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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.