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Finding the Fourth Proportional to 285,539.05, 428,005.69 and 133,608.12

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Solution

The fourth proportional to 285,539.05, 428,005.69 and 133,608.12 is: 200,270.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,539.05 : 428,005.69 = 133,608.12 : x
  2. Step 2: Convert to fraction form
    285,539.05/428,005.69 = 133,608.12/x
  3. Step 3: Cross multiply
    285,539.05x = 428,005.69 × 133,608.12
  4. Step 4: Simplify right side
    285,539.05x = 57,185,035,256.18
  5. Step 5: Solve for x
    x = 57,185,035,256.18/285,539.05
  6. Step 6: Final answer
    x = 200,270.46

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1.5x scale

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.