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Finding the Fourth Proportional to 6,387,878.35, 8,815,405.53 and 3,487,391.47

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Solution

The fourth proportional to 6,387,878.35, 8,815,405.53 and 3,487,391.47 is: 4,812,673.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387,878.35 : 8,815,405.53 = 3,487,391.47 : x
  2. Step 2: Convert to fraction form
    6,387,878.35/8,815,405.53 = 3,487,391.47/x
  3. Step 3: Cross multiply
    6,387,878.35x = 8,815,405.53 × 3,487,391.47
  4. Step 4: Simplify right side
    6,387,878.35x = 30,742,770,049,912.83
  5. Step 5: Solve for x
    x = 30,742,770,049,912.83/6,387,878.35
  6. Step 6: Final answer
    x = 4,812,673.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.