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Finding the Fourth Proportional to 305,220.45, 457,994.70 and 127,745.40

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Solution

The fourth proportional to 305,220.45, 457,994.70 and 127,745.40 is: 191,686.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,220.45 : 457,994.70 = 127,745.40 : x
  2. Step 2: Convert to fraction form
    305,220.45/457,994.70 = 127,745.40/x
  3. Step 3: Cross multiply
    305,220.45x = 457,994.70 × 127,745.40
  4. Step 4: Simplify right side
    305,220.45x = 58,506,716,149.38
  5. Step 5: Solve for x
    x = 58,506,716,149.38/305,220.45
  6. Step 6: Final answer
    x = 191,686.75

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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.