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Finding the Fourth Proportional to 934.81, 1,289.08 and 654.95

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Solution

The fourth proportional to 934.81, 1,289.08 and 654.95 is: 903.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.81 : 1,289.08 = 654.95 : x
  2. Step 2: Convert to fraction form
    934.81/1,289.08 = 654.95/x
  3. Step 3: Cross multiply
    934.81x = 1,289.08 × 654.95
  4. Step 4: Simplify right side
    934.81x = 844,286.99
  5. Step 5: Solve for x
    x = 844,286.99/934.81
  6. Step 6: Final answer
    x = 903.17

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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.