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Finding the Fourth Proportional to 303,570.40, 455,485.20 and 145,717.60

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Solution

The fourth proportional to 303,570.40, 455,485.20 and 145,717.60 is: 218,638.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,570.40 : 455,485.20 = 145,717.60 : x
  2. Step 2: Convert to fraction form
    303,570.40/455,485.20 = 145,717.60/x
  3. Step 3: Cross multiply
    303,570.40x = 455,485.20 × 145,717.60
  4. Step 4: Simplify right side
    303,570.40x = 66,372,210,179.52
  5. Step 5: Solve for x
    x = 66,372,210,179.52/303,570.40
  6. Step 6: Final answer
    x = 218,638.61

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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.