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Finding the Fourth Proportional to 733.68, 1,012.68 and 439.20

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Solution

The fourth proportional to 733.68, 1,012.68 and 439.20 is: 606.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.68 : 1,012.68 = 439.20 : x
  2. Step 2: Convert to fraction form
    733.68/1,012.68 = 439.20/x
  3. Step 3: Cross multiply
    733.68x = 1,012.68 × 439.20
  4. Step 4: Simplify right side
    733.68x = 444,769.06
  5. Step 5: Solve for x
    x = 444,769.06/733.68
  6. Step 6: Final answer
    x = 606.22

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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.