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Finding the Fourth Proportional to 270,535.27, 405,685.35 and 128,421.27

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Solution

The fourth proportional to 270,535.27, 405,685.35 and 128,421.27 is: 192,576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,535.27 : 405,685.35 = 128,421.27 : x
  2. Step 2: Convert to fraction form
    270,535.27/405,685.35 = 128,421.27/x
  3. Step 3: Cross multiply
    270,535.27x = 405,685.35 × 128,421.27
  4. Step 4: Simplify right side
    270,535.27x = 52,098,627,867.39
  5. Step 5: Solve for x
    x = 52,098,627,867.39/270,535.27
  6. Step 6: Final answer
    x = 192,576.10

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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.