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Finding the Fourth Proportional to 660.04, 988.44 and 641.50

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Solution

The fourth proportional to 660.04, 988.44 and 641.50 is: 960.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.04 : 988.44 = 641.50 : x
  2. Step 2: Convert to fraction form
    660.04/988.44 = 641.50/x
  3. Step 3: Cross multiply
    660.04x = 988.44 × 641.50
  4. Step 4: Simplify right side
    660.04x = 634,084.26
  5. Step 5: Solve for x
    x = 634,084.26/660.04
  6. Step 6: Final answer
    x = 960.68

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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.