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Finding the Fourth Proportional to 285,296.80, 427,945.20 and 270,090.40

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Solution

The fourth proportional to 285,296.80, 427,945.20 and 270,090.40 is: 405,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,296.80 : 427,945.20 = 270,090.40 : x
  2. Step 2: Convert to fraction form
    285,296.80/427,945.20 = 270,090.40/x
  3. Step 3: Cross multiply
    285,296.80x = 427,945.20 × 270,090.40
  4. Step 4: Simplify right side
    285,296.80x = 115,583,890,246.08
  5. Step 5: Solve for x
    x = 115,583,890,246.08/285,296.80
  6. Step 6: Final answer
    x = 405,135.60

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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.