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Finding the Fourth Proportional to 285,270.42, 427,780.83 and 135,553.62

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Solution

The fourth proportional to 285,270.42, 427,780.83 and 135,553.62 is: 203,271.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,270.42 : 427,780.83 = 135,553.62 : x
  2. Step 2: Convert to fraction form
    285,270.42/427,780.83 = 135,553.62/x
  3. Step 3: Cross multiply
    285,270.42x = 427,780.83 × 135,553.62
  4. Step 4: Simplify right side
    285,270.42x = 57,987,240,073.10
  5. Step 5: Solve for x
    x = 57,987,240,073.10/285,270.42
  6. Step 6: Final answer
    x = 203,271.13

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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.