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Finding the Fourth Proportional to 1,445.70, 2,169.22 and 458.67

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Solution

The fourth proportional to 1,445.70, 2,169.22 and 458.67 is: 688.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.70 : 2,169.22 = 458.67 : x
  2. Step 2: Convert to fraction form
    1,445.70/2,169.22 = 458.67/x
  3. Step 3: Cross multiply
    1,445.70x = 2,169.22 × 458.67
  4. Step 4: Simplify right side
    1,445.70x = 994,946.00
  5. Step 5: Solve for x
    x = 994,946.00/1,445.70
  6. Step 6: Final answer
    x = 688.21

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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.