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Finding the Fourth Proportional to 7,208,641.62, 9,946,855.31 and 4,378,215.31

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Solution

The fourth proportional to 7,208,641.62, 9,946,855.31 and 4,378,215.31 is: 6,041,287.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208,641.62 : 9,946,855.31 = 4,378,215.31 : x
  2. Step 2: Convert to fraction form
    7,208,641.62/9,946,855.31 = 4,378,215.31/x
  3. Step 3: Cross multiply
    7,208,641.62x = 9,946,855.31 × 4,378,215.31
  4. Step 4: Simplify right side
    7,208,641.62x = 43,549,474,204,596.80
  5. Step 5: Solve for x
    x = 43,549,474,204,596.80/7,208,641.62
  6. Step 6: Final answer
    x = 6,041,287.18

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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.