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Finding the Fourth Proportional to 657.77, 981.37 and 626.81

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Solution

The fourth proportional to 657.77, 981.37 and 626.81 is: 935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.77 : 981.37 = 626.81 : x
  2. Step 2: Convert to fraction form
    657.77/981.37 = 626.81/x
  3. Step 3: Cross multiply
    657.77x = 981.37 × 626.81
  4. Step 4: Simplify right side
    657.77x = 615,129.40
  5. Step 5: Solve for x
    x = 615,129.40/657.77
  6. Step 6: Final answer
    x = 935.17

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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.