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Finding the Fourth Proportional to 435.87, 653.81 and 289.67

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Solution

The fourth proportional to 435.87, 653.81 and 289.67 is: 434.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.87 : 653.81 = 289.67 : x
  2. Step 2: Convert to fraction form
    435.87/653.81 = 289.67/x
  3. Step 3: Cross multiply
    435.87x = 653.81 × 289.67
  4. Step 4: Simplify right side
    435.87x = 189,384.43
  5. Step 5: Solve for x
    x = 189,384.43/435.87
  6. Step 6: Final answer
    x = 434.50

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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.