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Finding the Fourth Proportional to 693.02, 1,038.36 and 667.46

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Solution

The fourth proportional to 693.02, 1,038.36 and 667.46 is: 1,000.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.02 : 1,038.36 = 667.46 : x
  2. Step 2: Convert to fraction form
    693.02/1,038.36 = 667.46/x
  3. Step 3: Cross multiply
    693.02x = 1,038.36 × 667.46
  4. Step 4: Simplify right side
    693.02x = 693,063.77
  5. Step 5: Solve for x
    x = 693,063.77/693.02
  6. Step 6: Final answer
    x = 1,000.06

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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.