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Finding the Fourth Proportional to 660.99, 979.80 and 650.67

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Solution

The fourth proportional to 660.99, 979.80 and 650.67 is: 964.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.99 : 979.80 = 650.67 : x
  2. Step 2: Convert to fraction form
    660.99/979.80 = 650.67/x
  3. Step 3: Cross multiply
    660.99x = 979.80 × 650.67
  4. Step 4: Simplify right side
    660.99x = 637,526.47
  5. Step 5: Solve for x
    x = 637,526.47/660.99
  6. Step 6: Final answer
    x = 964.50

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.