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Finding the Fourth Proportional to 486,352.54, 671,048.31 and 285,109.66

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Solution

The fourth proportional to 486,352.54, 671,048.31 and 285,109.66 is: 393,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,352.54 : 671,048.31 = 285,109.66 : x
  2. Step 2: Convert to fraction form
    486,352.54/671,048.31 = 285,109.66/x
  3. Step 3: Cross multiply
    486,352.54x = 671,048.31 × 285,109.66
  4. Step 4: Simplify right side
    486,352.54x = 191,322,355,507.68
  5. Step 5: Solve for x
    x = 191,322,355,507.68/486,352.54
  6. Step 6: Final answer
    x = 393,382.04

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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.