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Finding the Fourth Proportional to 5,166,751.20, 7,746,627.60 and 2,640,328.80

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Solution

The fourth proportional to 5,166,751.20, 7,746,627.60 and 2,640,328.80 is: 3,958,705.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166,751.20 : 7,746,627.60 = 2,640,328.80 : x
  2. Step 2: Convert to fraction form
    5,166,751.20/7,746,627.60 = 2,640,328.80/x
  3. Step 3: Cross multiply
    5,166,751.20x = 7,746,627.60 × 2,640,328.80
  4. Step 4: Simplify right side
    5,166,751.20x = 20,453,643,955,154.88
  5. Step 5: Solve for x
    x = 20,453,643,955,154.88/5,166,751.20
  6. Step 6: Final answer
    x = 3,958,705.03

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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.