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Finding the Fourth Proportional to 40,303.40, 60,455.10 and 20,620.40

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Solution

The fourth proportional to 40,303.40, 60,455.10 and 20,620.40 is: 30,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,303.40 : 60,455.10 = 20,620.40 : x
  2. Step 2: Convert to fraction form
    40,303.40/60,455.10 = 20,620.40/x
  3. Step 3: Cross multiply
    40,303.40x = 60,455.10 × 20,620.40
  4. Step 4: Simplify right side
    40,303.40x = 1,246,608,344.04
  5. Step 5: Solve for x
    x = 1,246,608,344.04/40,303.40
  6. Step 6: Final answer
    x = 30,930.60

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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.