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Finding the Fourth Proportional to 1,330.43, 1,995.95 and 636.89

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Solution

The fourth proportional to 1,330.43, 1,995.95 and 636.89 is: 955.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.43 : 1,995.95 = 636.89 : x
  2. Step 2: Convert to fraction form
    1,330.43/1,995.95 = 636.89/x
  3. Step 3: Cross multiply
    1,330.43x = 1,995.95 × 636.89
  4. Step 4: Simplify right side
    1,330.43x = 1,271,187.43
  5. Step 5: Solve for x
    x = 1,271,187.43/1,330.43
  6. Step 6: Final answer
    x = 955.47

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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.