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Finding the Fourth Proportional to 754.32, 1,040.88 and 435.28

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Solution

The fourth proportional to 754.32, 1,040.88 and 435.28 is: 600.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.32 : 1,040.88 = 435.28 : x
  2. Step 2: Convert to fraction form
    754.32/1,040.88 = 435.28/x
  3. Step 3: Cross multiply
    754.32x = 1,040.88 × 435.28
  4. Step 4: Simplify right side
    754.32x = 453,074.25
  5. Step 5: Solve for x
    x = 453,074.25/754.32
  6. Step 6: Final answer
    x = 600.64

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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.