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Finding the Fourth Proportional to 270,275.20, 405,462.21 and 90,343.60

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Solution

The fourth proportional to 270,275.20, 405,462.21 and 90,343.60 is: 135,531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,275.20 : 405,462.21 = 90,343.60 : x
  2. Step 2: Convert to fraction form
    270,275.20/405,462.21 = 90,343.60/x
  3. Step 3: Cross multiply
    270,275.20x = 405,462.21 × 90,343.60
  4. Step 4: Simplify right side
    270,275.20x = 36,630,915,715.36
  5. Step 5: Solve for x
    x = 36,630,915,715.36/270,275.20
  6. Step 6: Final answer
    x = 135,531.92

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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.