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Finding the Fourth Proportional to 305,378.73, 421,146.54 and 190,667.73

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Solution

The fourth proportional to 305,378.73, 421,146.54 and 190,667.73 is: 262,949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,378.73 : 421,146.54 = 190,667.73 : x
  2. Step 2: Convert to fraction form
    305,378.73/421,146.54 = 190,667.73/x
  3. Step 3: Cross multiply
    305,378.73x = 421,146.54 × 190,667.73
  4. Step 4: Simplify right side
    305,378.73x = 80,299,054,779.15
  5. Step 5: Solve for x
    x = 80,299,054,779.15/305,378.73
  6. Step 6: Final answer
    x = 262,949.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.