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Finding the Fourth Proportional to 1,330.80, 1,995.34 and 637.45

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Solution

The fourth proportional to 1,330.80, 1,995.34 and 637.45 is: 955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.80 : 1,995.34 = 637.45 : x
  2. Step 2: Convert to fraction form
    1,330.80/1,995.34 = 637.45/x
  3. Step 3: Cross multiply
    1,330.80x = 1,995.34 × 637.45
  4. Step 4: Simplify right side
    1,330.80x = 1,271,926.30
  5. Step 5: Solve for x
    x = 1,271,926.30/1,330.80
  6. Step 6: Final answer
    x = 955.76

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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.