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Finding the Fourth Proportional to 663.06, 989.19 and 609.50

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Solution

The fourth proportional to 663.06, 989.19 and 609.50 is: 909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.06 : 989.19 = 609.50 : x
  2. Step 2: Convert to fraction form
    663.06/989.19 = 609.50/x
  3. Step 3: Cross multiply
    663.06x = 989.19 × 609.50
  4. Step 4: Simplify right side
    663.06x = 602,909.28
  5. Step 5: Solve for x
    x = 602,909.28/663.06
  6. Step 6: Final answer
    x = 909.28

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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.