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Finding the Fourth Proportional to 4,717,978.47, 7,078,453.17 and 1,685,277.21

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Solution

The fourth proportional to 4,717,978.47, 7,078,453.17 and 1,685,277.21 is: 2,528,446.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,717,978.47 : 7,078,453.17 = 1,685,277.21 : x
  2. Step 2: Convert to fraction form
    4,717,978.47/7,078,453.17 = 1,685,277.21/x
  3. Step 3: Cross multiply
    4,717,978.47x = 7,078,453.17 × 1,685,277.21
  4. Step 4: Simplify right side
    4,717,978.47x = 11,929,155,809,453.26
  5. Step 5: Solve for x
    x = 11,929,155,809,453.26/4,717,978.47
  6. Step 6: Final answer
    x = 2,528,446.43

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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.