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Finding the Fourth Proportional to 662.46, 988.08 and 651.60

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Solution

The fourth proportional to 662.46, 988.08 and 651.60 is: 971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.46 : 988.08 = 651.60 : x
  2. Step 2: Convert to fraction form
    662.46/988.08 = 651.60/x
  3. Step 3: Cross multiply
    662.46x = 988.08 × 651.60
  4. Step 4: Simplify right side
    662.46x = 643,832.93
  5. Step 5: Solve for x
    x = 643,832.93/662.46
  6. Step 6: Final answer
    x = 971.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.