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Finding the Fourth Proportional to 620,112.62, 930,266.40 and 265,128.50

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Solution

The fourth proportional to 620,112.62, 930,266.40 and 265,128.50 is: 397,734.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,112.62 : 930,266.40 = 265,128.50 : x
  2. Step 2: Convert to fraction form
    620,112.62/930,266.40 = 265,128.50/x
  3. Step 3: Cross multiply
    620,112.62x = 930,266.40 × 265,128.50
  4. Step 4: Simplify right side
    620,112.62x = 246,640,135,232.40
  5. Step 5: Solve for x
    x = 246,640,135,232.40/620,112.62
  6. Step 6: Final answer
    x = 397,734.42

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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.