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Finding the Fourth Proportional to 305,737.56, 421,903.75 and 169,780.20

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Solution

The fourth proportional to 305,737.56, 421,903.75 and 169,780.20 is: 234,288.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,737.56 : 421,903.75 = 169,780.20 : x
  2. Step 2: Convert to fraction form
    305,737.56/421,903.75 = 169,780.20/x
  3. Step 3: Cross multiply
    305,737.56x = 421,903.75 × 169,780.20
  4. Step 4: Simplify right side
    305,737.56x = 71,630,903,055.75
  5. Step 5: Solve for x
    x = 71,630,903,055.75/305,737.56
  6. Step 6: Final answer
    x = 234,288.86

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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.