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Finding the Fourth Proportional to 955.70, 1,433.55 and 339.42

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Solution

The fourth proportional to 955.70, 1,433.55 and 339.42 is: 509.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.70 : 1,433.55 = 339.42 : x
  2. Step 2: Convert to fraction form
    955.70/1,433.55 = 339.42/x
  3. Step 3: Cross multiply
    955.70x = 1,433.55 × 339.42
  4. Step 4: Simplify right side
    955.70x = 486,575.54
  5. Step 5: Solve for x
    x = 486,575.54/955.70
  6. Step 6: Final answer
    x = 509.13

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1.5x scale

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.