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Finding the Fourth Proportional to 2,814.90, 4,220.93 and 866.85

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Solution

The fourth proportional to 2,814.90, 4,220.93 and 866.85 is: 1,299.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.90 : 4,220.93 = 866.85 : x
  2. Step 2: Convert to fraction form
    2,814.90/4,220.93 = 866.85/x
  3. Step 3: Cross multiply
    2,814.90x = 4,220.93 × 866.85
  4. Step 4: Simplify right side
    2,814.90x = 3,658,915.34
  5. Step 5: Solve for x
    x = 3,658,915.34/2,814.90
  6. Step 6: Final answer
    x = 1,299.84

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1.5x scale

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.