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Finding the Fourth Proportional to 700.21, 1,043.88 and 667.41

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Solution

The fourth proportional to 700.21, 1,043.88 and 667.41 is: 994.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.21 : 1,043.88 = 667.41 : x
  2. Step 2: Convert to fraction form
    700.21/1,043.88 = 667.41/x
  3. Step 3: Cross multiply
    700.21x = 1,043.88 × 667.41
  4. Step 4: Simplify right side
    700.21x = 696,695.95
  5. Step 5: Solve for x
    x = 696,695.95/700.21
  6. Step 6: Final answer
    x = 994.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.