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Finding the Fourth Proportional to 258,412.95, 356,581.33 and 155,041.67

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Solution

The fourth proportional to 258,412.95, 356,581.33 and 155,041.67 is: 213,940.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,412.95 : 356,581.33 = 155,041.67 : x
  2. Step 2: Convert to fraction form
    258,412.95/356,581.33 = 155,041.67/x
  3. Step 3: Cross multiply
    258,412.95x = 356,581.33 × 155,041.67
  4. Step 4: Simplify right side
    258,412.95x = 55,284,965,397.87
  5. Step 5: Solve for x
    x = 55,284,965,397.87/258,412.95
  6. Step 6: Final answer
    x = 213,940.38

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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.