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Finding the Fourth Proportional to 635.70, 953.55 and 622.20

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Solution

The fourth proportional to 635.70, 953.55 and 622.20 is: 933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.70 : 953.55 = 622.20 : x
  2. Step 2: Convert to fraction form
    635.70/953.55 = 622.20/x
  3. Step 3: Cross multiply
    635.70x = 953.55 × 622.20
  4. Step 4: Simplify right side
    635.70x = 593,298.81
  5. Step 5: Solve for x
    x = 593,298.81/635.70
  6. Step 6: Final answer
    x = 933.30

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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.