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Finding the Fourth Proportional to 768,657.20, 1,153,331.40 and 347,716.40

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Solution

The fourth proportional to 768,657.20, 1,153,331.40 and 347,716.40 is: 521,730.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,657.20 : 1,153,331.40 = 347,716.40 : x
  2. Step 2: Convert to fraction form
    768,657.20/1,153,331.40 = 347,716.40/x
  3. Step 3: Cross multiply
    768,657.20x = 1,153,331.40 × 347,716.40
  4. Step 4: Simplify right side
    768,657.20x = 401,032,242,414.96
  5. Step 5: Solve for x
    x = 401,032,242,414.96/768,657.20
  6. Step 6: Final answer
    x = 521,730.94

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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.