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Finding the Fourth Proportional to 768,405.70, 1,152,936.60 and 368,840.80

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Solution

The fourth proportional to 768,405.70, 1,152,936.60 and 368,840.80 is: 553,418.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,405.70 : 1,152,936.60 = 368,840.80 : x
  2. Step 2: Convert to fraction form
    768,405.70/1,152,936.60 = 368,840.80/x
  3. Step 3: Cross multiply
    768,405.70x = 1,152,936.60 × 368,840.80
  4. Step 4: Simplify right side
    768,405.70x = 425,250,057,893.28
  5. Step 5: Solve for x
    x = 425,250,057,893.28/768,405.70
  6. Step 6: Final answer
    x = 553,418.67

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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.