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Finding the Fourth Proportional to 303,970.20, 455,264.10 and 191,995.80

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Solution

The fourth proportional to 303,970.20, 455,264.10 and 191,995.80 is: 287,557.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,970.20 : 455,264.10 = 191,995.80 : x
  2. Step 2: Convert to fraction form
    303,970.20/455,264.10 = 191,995.80/x
  3. Step 3: Cross multiply
    303,970.20x = 455,264.10 × 191,995.80
  4. Step 4: Simplify right side
    303,970.20x = 87,408,795,090.78
  5. Step 5: Solve for x
    x = 87,408,795,090.78/303,970.20
  6. Step 6: Final answer
    x = 287,557.12

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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.