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Finding the Fourth Proportional to 303,571.40, 455,486.70 and 145,718.60

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Solution

The fourth proportional to 303,571.40, 455,486.70 and 145,718.60 is: 218,640.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,571.40 : 455,486.70 = 145,718.60 : x
  2. Step 2: Convert to fraction form
    303,571.40/455,486.70 = 145,718.60/x
  3. Step 3: Cross multiply
    303,571.40x = 455,486.70 × 145,718.60
  4. Step 4: Simplify right side
    303,571.40x = 66,372,884,242.62
  5. Step 5: Solve for x
    x = 66,372,884,242.62/303,571.40
  6. Step 6: Final answer
    x = 218,640.11

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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.