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Finding the Fourth Proportional to 753.56, 1,128.71 and 622.08

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Solution

The fourth proportional to 753.56, 1,128.71 and 622.08 is: 931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.56 : 1,128.71 = 622.08 : x
  2. Step 2: Convert to fraction form
    753.56/1,128.71 = 622.08/x
  3. Step 3: Cross multiply
    753.56x = 1,128.71 × 622.08
  4. Step 4: Simplify right side
    753.56x = 702,144.81
  5. Step 5: Solve for x
    x = 702,144.81/753.56
  6. Step 6: Final answer
    x = 931.78

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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.