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Finding the Fourth Proportional to 1,330.83, 1,993.21 and 637.98

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Solution

The fourth proportional to 1,330.83, 1,993.21 and 637.98 is: 955.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.83 : 1,993.21 = 637.98 : x
  2. Step 2: Convert to fraction form
    1,330.83/1,993.21 = 637.98/x
  3. Step 3: Cross multiply
    1,330.83x = 1,993.21 × 637.98
  4. Step 4: Simplify right side
    1,330.83x = 1,271,628.12
  5. Step 5: Solve for x
    x = 1,271,628.12/1,330.83
  6. Step 6: Final answer
    x = 955.52

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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.