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Finding the Fourth Proportional to 657.37, 986.78 and 654.93

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Solution

The fourth proportional to 657.37, 986.78 and 654.93 is: 983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.37 : 986.78 = 654.93 : x
  2. Step 2: Convert to fraction form
    657.37/986.78 = 654.93/x
  3. Step 3: Cross multiply
    657.37x = 986.78 × 654.93
  4. Step 4: Simplify right side
    657.37x = 646,265.24
  5. Step 5: Solve for x
    x = 646,265.24/657.37
  6. Step 6: Final answer
    x = 983.10

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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.