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Finding the Fourth Proportional to 303,465.55, 455,690.40 and 219,812.80

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Solution

The fourth proportional to 303,465.55, 455,690.40 and 219,812.80 is: 330,075.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,465.55 : 455,690.40 = 219,812.80 : x
  2. Step 2: Convert to fraction form
    303,465.55/455,690.40 = 219,812.80/x
  3. Step 3: Cross multiply
    303,465.55x = 455,690.40 × 219,812.80
  4. Step 4: Simplify right side
    303,465.55x = 100,166,582,757.12
  5. Step 5: Solve for x
    x = 100,166,582,757.12/303,465.55
  6. Step 6: Final answer
    x = 330,075.63

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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.