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Finding the Fourth Proportional to 303,619.30, 455,428.95 and 145,809.70

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Solution

The fourth proportional to 303,619.30, 455,428.95 and 145,809.70 is: 218,714.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,619.30 : 455,428.95 = 145,809.70 : x
  2. Step 2: Convert to fraction form
    303,619.30/455,428.95 = 145,809.70/x
  3. Step 3: Cross multiply
    303,619.30x = 455,428.95 × 145,809.70
  4. Step 4: Simplify right side
    303,619.30x = 66,405,958,570.82
  5. Step 5: Solve for x
    x = 66,405,958,570.82/303,619.30
  6. Step 6: Final answer
    x = 218,714.55

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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.