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Finding the Fourth Proportional to 1,223,213.70, 1,834,820.55 and 744,916.80

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Solution

The fourth proportional to 1,223,213.70, 1,834,820.55 and 744,916.80 is: 1,117,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,213.70 : 1,834,820.55 = 744,916.80 : x
  2. Step 2: Convert to fraction form
    1,223,213.70/1,834,820.55 = 744,916.80/x
  3. Step 3: Cross multiply
    1,223,213.70x = 1,834,820.55 × 744,916.80
  4. Step 4: Simplify right side
    1,223,213.70x = 1,366,788,652,680.24
  5. Step 5: Solve for x
    x = 1,366,788,652,680.24/1,223,213.70
  6. Step 6: Final answer
    x = 1,117,375.20

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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.