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Finding the Fourth Proportional to 660.10, 989.36 and 294.08

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Solution

The fourth proportional to 660.10, 989.36 and 294.08 is: 440.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.10 : 989.36 = 294.08 : x
  2. Step 2: Convert to fraction form
    660.10/989.36 = 294.08/x
  3. Step 3: Cross multiply
    660.10x = 989.36 × 294.08
  4. Step 4: Simplify right side
    660.10x = 290,952.89
  5. Step 5: Solve for x
    x = 290,952.89/660.10
  6. Step 6: Final answer
    x = 440.77

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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.