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Finding the Fourth Proportional to 955.71, 1,434.25 and 339.42

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Solution

The fourth proportional to 955.71, 1,434.25 and 339.42 is: 509.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.71 : 1,434.25 = 339.42 : x
  2. Step 2: Convert to fraction form
    955.71/1,434.25 = 339.42/x
  3. Step 3: Cross multiply
    955.71x = 1,434.25 × 339.42
  4. Step 4: Simplify right side
    955.71x = 486,808.18
  5. Step 5: Solve for x
    x = 486,808.18/955.71
  6. Step 6: Final answer
    x = 509.37

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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.