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Finding the Fourth Proportional to 649.66, 974.59 and 259.67

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Solution

The fourth proportional to 649.66, 974.59 and 259.67 is: 389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.66 : 974.59 = 259.67 : x
  2. Step 2: Convert to fraction form
    649.66/974.59 = 259.67/x
  3. Step 3: Cross multiply
    649.66x = 974.59 × 259.67
  4. Step 4: Simplify right side
    649.66x = 253,065.61
  5. Step 5: Solve for x
    x = 253,065.61/649.66
  6. Step 6: Final answer
    x = 389.54

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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.