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Finding the Fourth Proportional to 869,136.40, 1,302,149.40 and 744,720.40

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Solution

The fourth proportional to 869,136.40, 1,302,149.40 and 744,720.40 is: 1,115,748.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,136.40 : 1,302,149.40 = 744,720.40 : x
  2. Step 2: Convert to fraction form
    869,136.40/1,302,149.40 = 744,720.40/x
  3. Step 3: Cross multiply
    869,136.40x = 1,302,149.40 × 744,720.40
  4. Step 4: Simplify right side
    869,136.40x = 969,737,222,027.76
  5. Step 5: Solve for x
    x = 969,737,222,027.76/869,136.40
  6. Step 6: Final answer
    x = 1,115,748.03

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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.