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Finding the Fourth Proportional to 1,084.32, 1,626.77 and 499.69

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Solution

The fourth proportional to 1,084.32, 1,626.77 and 499.69 is: 749.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.32 : 1,626.77 = 499.69 : x
  2. Step 2: Convert to fraction form
    1,084.32/1,626.77 = 499.69/x
  3. Step 3: Cross multiply
    1,084.32x = 1,626.77 × 499.69
  4. Step 4: Simplify right side
    1,084.32x = 812,880.70
  5. Step 5: Solve for x
    x = 812,880.70/1,084.32
  6. Step 6: Final answer
    x = 749.67

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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.