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Finding the Fourth Proportional to 733.86, 1,012.90 and 439.36

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Solution

The fourth proportional to 733.86, 1,012.90 and 439.36 is: 606.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.86 : 1,012.90 = 439.36 : x
  2. Step 2: Convert to fraction form
    733.86/1,012.90 = 439.36/x
  3. Step 3: Cross multiply
    733.86x = 1,012.90 × 439.36
  4. Step 4: Simplify right side
    733.86x = 445,027.74
  5. Step 5: Solve for x
    x = 445,027.74/733.86
  6. Step 6: Final answer
    x = 606.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.