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Finding the Fourth Proportional to 300,921.60, 451,382.40 and 262,430.40

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Solution

The fourth proportional to 300,921.60, 451,382.40 and 262,430.40 is: 393,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,921.60 : 451,382.40 = 262,430.40 : x
  2. Step 2: Convert to fraction form
    300,921.60/451,382.40 = 262,430.40/x
  3. Step 3: Cross multiply
    300,921.60x = 451,382.40 × 262,430.40
  4. Step 4: Simplify right side
    300,921.60x = 118,456,463,784.96
  5. Step 5: Solve for x
    x = 118,456,463,784.96/300,921.60
  6. Step 6: Final answer
    x = 393,645.60

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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.