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Finding the Fourth Proportional to 661.11, 985.85 and 614.94

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Solution

The fourth proportional to 661.11, 985.85 and 614.94 is: 917.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.11 : 985.85 = 614.94 : x
  2. Step 2: Convert to fraction form
    661.11/985.85 = 614.94/x
  3. Step 3: Cross multiply
    661.11x = 985.85 × 614.94
  4. Step 4: Simplify right side
    661.11x = 606,238.60
  5. Step 5: Solve for x
    x = 606,238.60/661.11
  6. Step 6: Final answer
    x = 917.00

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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.