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Finding the Fourth Proportional to 768,270.60, 1,152,405.90 and 728,904.60

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Solution

The fourth proportional to 768,270.60, 1,152,405.90 and 728,904.60 is: 1,093,356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,270.60 : 1,152,405.90 = 728,904.60 : x
  2. Step 2: Convert to fraction form
    768,270.60/1,152,405.90 = 728,904.60/x
  3. Step 3: Cross multiply
    768,270.60x = 1,152,405.90 × 728,904.60
  4. Step 4: Simplify right side
    768,270.60x = 839,993,961,577.14
  5. Step 5: Solve for x
    x = 839,993,961,577.14/768,270.60
  6. Step 6: Final answer
    x = 1,093,356.90

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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.