Home / 285,659.40-428,489.10-180,942.60

Finding the Fourth Proportional to 285,659.40, 428,489.10 and 180,942.60

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Solution

The fourth proportional to 285,659.40, 428,489.10 and 180,942.60 is: 271,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,659.40 : 428,489.10 = 180,942.60 : x
  2. Step 2: Convert to fraction form
    285,659.40/428,489.10 = 180,942.60/x
  3. Step 3: Cross multiply
    285,659.40x = 428,489.10 × 180,942.60
  4. Step 4: Simplify right side
    285,659.40x = 77,531,931,825.66
  5. Step 5: Solve for x
    x = 77,531,931,825.66/285,659.40
  6. Step 6: Final answer
    x = 271,413.90

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Why These Related Problems?

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