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Finding the Fourth Proportional to 454,403.67, 681,607.13 and 138,859.26

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Solution

The fourth proportional to 454,403.67, 681,607.13 and 138,859.26 is: 208,289.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,403.67 : 681,607.13 = 138,859.26 : x
  2. Step 2: Convert to fraction form
    454,403.67/681,607.13 = 138,859.26/x
  3. Step 3: Cross multiply
    454,403.67x = 681,607.13 × 138,859.26
  4. Step 4: Simplify right side
    454,403.67x = 94,647,460,988.23
  5. Step 5: Solve for x
    x = 94,647,460,988.23/454,403.67
  6. Step 6: Final answer
    x = 208,289.39

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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.