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Finding the Fourth Proportional to 663.03, 988.43 and 626.58

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Solution

The fourth proportional to 663.03, 988.43 and 626.58 is: 934.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.03 : 988.43 = 626.58 : x
  2. Step 2: Convert to fraction form
    663.03/988.43 = 626.58/x
  3. Step 3: Cross multiply
    663.03x = 988.43 × 626.58
  4. Step 4: Simplify right side
    663.03x = 619,327.34
  5. Step 5: Solve for x
    x = 619,327.34/663.03
  6. Step 6: Final answer
    x = 934.09

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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.