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Finding the Fourth Proportional to 280,361.70, 386,885.63 and 159,491.61

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Solution

The fourth proportional to 280,361.70, 386,885.63 and 159,491.61 is: 220,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,361.70 : 386,885.63 = 159,491.61 : x
  2. Step 2: Convert to fraction form
    280,361.70/386,885.63 = 159,491.61/x
  3. Step 3: Cross multiply
    280,361.70x = 386,885.63 × 159,491.61
  4. Step 4: Simplify right side
    280,361.70x = 61,705,012,413.29
  5. Step 5: Solve for x
    x = 61,705,012,413.29/280,361.70
  6. Step 6: Final answer
    x = 220,090.73

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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.