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Finding the Fourth Proportional to 691,600.48, 954,435.36 and 389,788

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Solution

The fourth proportional to 691,600.48, 954,435.36 and 389,788 is: 537,922.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,600.48 : 954,435.36 = 389,788 : x
  2. Step 2: Convert to fraction form
    691,600.48/954,435.36 = 389,788/x
  3. Step 3: Cross multiply
    691,600.48x = 954,435.36 × 389,788
  4. Step 4: Simplify right side
    691,600.48x = 372,027,450,103.68
  5. Step 5: Solve for x
    x = 372,027,450,103.68/691,600.48
  6. Step 6: Final answer
    x = 537,922.49

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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.