Home / 258,420.81-356,620.73-145,243.56

Finding the Fourth Proportional to 258,420.81, 356,620.73 and 145,243.56

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Solution

The fourth proportional to 258,420.81, 356,620.73 and 145,243.56 is: 200,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,420.81 : 356,620.73 = 145,243.56 : x
  2. Step 2: Convert to fraction form
    258,420.81/356,620.73 = 145,243.56/x
  3. Step 3: Cross multiply
    258,420.81x = 356,620.73 × 145,243.56
  4. Step 4: Simplify right side
    258,420.81x = 51,796,864,395.00
  5. Step 5: Solve for x
    x = 51,796,864,395.00/258,420.81
  6. Step 6: Final answer
    x = 200,436.12

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1.5x scale

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.