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Finding the Fourth Proportional to 955.40, 1,433.07 and 306.12

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Solution

The fourth proportional to 955.40, 1,433.07 and 306.12 is: 459.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.40 : 1,433.07 = 306.12 : x
  2. Step 2: Convert to fraction form
    955.40/1,433.07 = 306.12/x
  3. Step 3: Cross multiply
    955.40x = 1,433.07 × 306.12
  4. Step 4: Simplify right side
    955.40x = 438,691.39
  5. Step 5: Solve for x
    x = 438,691.39/955.40
  6. Step 6: Final answer
    x = 459.17

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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.