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Finding the Fourth Proportional to 303,390.45, 455,249.70 and 125,915.40

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Solution

The fourth proportional to 303,390.45, 455,249.70 and 125,915.40 is: 188,941.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,390.45 : 455,249.70 = 125,915.40 : x
  2. Step 2: Convert to fraction form
    303,390.45/455,249.70 = 125,915.40/x
  3. Step 3: Cross multiply
    303,390.45x = 455,249.70 × 125,915.40
  4. Step 4: Simplify right side
    303,390.45x = 57,322,948,075.38
  5. Step 5: Solve for x
    x = 57,322,948,075.38/303,390.45
  6. Step 6: Final answer
    x = 188,941.17

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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.