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Finding the Fourth Proportional to 620,611.20, 930,916.80 and 616,674.60

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Solution

The fourth proportional to 620,611.20, 930,916.80 and 616,674.60 is: 925,011.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,611.20 : 930,916.80 = 616,674.60 : x
  2. Step 2: Convert to fraction form
    620,611.20/930,916.80 = 616,674.60/x
  3. Step 3: Cross multiply
    620,611.20x = 930,916.80 × 616,674.60
  4. Step 4: Simplify right side
    620,611.20x = 574,072,745,273.28
  5. Step 5: Solve for x
    x = 574,072,745,273.28/620,611.20
  6. Step 6: Final answer
    x = 925,011.90

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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.