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Finding the Fourth Proportional to 768,783.60, 1,153,175.40 and 342,318.60

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Solution

The fourth proportional to 768,783.60, 1,153,175.40 and 342,318.60 is: 513,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,783.60 : 1,153,175.40 = 342,318.60 : x
  2. Step 2: Convert to fraction form
    768,783.60/1,153,175.40 = 342,318.60/x
  3. Step 3: Cross multiply
    768,783.60x = 1,153,175.40 × 342,318.60
  4. Step 4: Simplify right side
    768,783.60x = 394,753,388,482.44
  5. Step 5: Solve for x
    x = 394,753,388,482.44/768,783.60
  6. Step 6: Final answer
    x = 513,477.90

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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.