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Finding the Fourth Proportional to 262,978.80, 394,565.40 and 105,320.40

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Solution

The fourth proportional to 262,978.80, 394,565.40 and 105,320.40 is: 158,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,978.80 : 394,565.40 = 105,320.40 : x
  2. Step 2: Convert to fraction form
    262,978.80/394,565.40 = 105,320.40/x
  3. Step 3: Cross multiply
    262,978.80x = 394,565.40 × 105,320.40
  4. Step 4: Simplify right side
    262,978.80x = 41,555,785,754.16
  5. Step 5: Solve for x
    x = 41,555,785,754.16/262,978.80
  6. Step 6: Final answer
    x = 158,019.53

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.