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Finding the Fourth Proportional to 955.95, 1,434.12 and 339.63

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Solution

The fourth proportional to 955.95, 1,434.12 and 339.63 is: 509.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.95 : 1,434.12 = 339.63 : x
  2. Step 2: Convert to fraction form
    955.95/1,434.12 = 339.63/x
  3. Step 3: Cross multiply
    955.95x = 1,434.12 × 339.63
  4. Step 4: Simplify right side
    955.95x = 487,070.18
  5. Step 5: Solve for x
    x = 487,070.18/955.95
  6. Step 6: Final answer
    x = 509.51

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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.