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Finding the Fourth Proportional to 734.05, 1,012.88 and 439.25

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Solution

The fourth proportional to 734.05, 1,012.88 and 439.25 is: 606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.05 : 1,012.88 = 439.25 : x
  2. Step 2: Convert to fraction form
    734.05/1,012.88 = 439.25/x
  3. Step 3: Cross multiply
    734.05x = 1,012.88 × 439.25
  4. Step 4: Simplify right side
    734.05x = 444,907.54
  5. Step 5: Solve for x
    x = 444,907.54/734.05
  6. Step 6: Final answer
    x = 606.10

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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.