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Finding the Fourth Proportional to 303,710.80, 455,940.60 and 191,390.80

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Solution

The fourth proportional to 303,710.80, 455,940.60 and 191,390.80 is: 287,322.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,710.80 : 455,940.60 = 191,390.80 : x
  2. Step 2: Convert to fraction form
    303,710.80/455,940.60 = 191,390.80/x
  3. Step 3: Cross multiply
    303,710.80x = 455,940.60 × 191,390.80
  4. Step 4: Simplify right side
    303,710.80x = 87,262,836,186.48
  5. Step 5: Solve for x
    x = 87,262,836,186.48/303,710.80
  6. Step 6: Final answer
    x = 287,322.14

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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.