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Finding the Fourth Proportional to 312,400.80, 468,601.20 and 300,153.60

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Solution

The fourth proportional to 312,400.80, 468,601.20 and 300,153.60 is: 450,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,400.80 : 468,601.20 = 300,153.60 : x
  2. Step 2: Convert to fraction form
    312,400.80/468,601.20 = 300,153.60/x
  3. Step 3: Cross multiply
    312,400.80x = 468,601.20 × 300,153.60
  4. Step 4: Simplify right side
    312,400.80x = 140,652,337,144.32
  5. Step 5: Solve for x
    x = 140,652,337,144.32/312,400.80
  6. Step 6: Final answer
    x = 450,230.40

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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.