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Finding the Fourth Proportional to 6,642,706.40, 9,966,392.40 and 2,857,349.60

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Solution

The fourth proportional to 6,642,706.40, 9,966,392.40 and 2,857,349.60 is: 4,287,027.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,706.40 : 9,966,392.40 = 2,857,349.60 : x
  2. Step 2: Convert to fraction form
    6,642,706.40/9,966,392.40 = 2,857,349.60/x
  3. Step 3: Cross multiply
    6,642,706.40x = 9,966,392.40 × 2,857,349.60
  4. Step 4: Simplify right side
    6,642,706.40x = 28,477,467,337,583.04
  5. Step 5: Solve for x
    x = 28,477,467,337,583.04/6,642,706.40
  6. Step 6: Final answer
    x = 4,287,027.85

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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.