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Finding the Fourth Proportional to 955.39, 1,433.15 and 407.57

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Solution

The fourth proportional to 955.39, 1,433.15 and 407.57 is: 611.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.39 : 1,433.15 = 407.57 : x
  2. Step 2: Convert to fraction form
    955.39/1,433.15 = 407.57/x
  3. Step 3: Cross multiply
    955.39x = 1,433.15 × 407.57
  4. Step 4: Simplify right side
    955.39x = 584,108.95
  5. Step 5: Solve for x
    x = 584,108.95/955.39
  6. Step 6: Final answer
    x = 611.38

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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.