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Finding the Fourth Proportional to 955.88, 1,434.48 and 339.60

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Solution

The fourth proportional to 955.88, 1,434.48 and 339.60 is: 509.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.88 : 1,434.48 = 339.60 : x
  2. Step 2: Convert to fraction form
    955.88/1,434.48 = 339.60/x
  3. Step 3: Cross multiply
    955.88x = 1,434.48 × 339.60
  4. Step 4: Simplify right side
    955.88x = 487,149.41
  5. Step 5: Solve for x
    x = 487,149.41/955.88
  6. Step 6: Final answer
    x = 509.63

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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.