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Finding the Fourth Proportional to 305,801.30, 458,811.30 and 128,362.70

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Solution

The fourth proportional to 305,801.30, 458,811.30 and 128,362.70 is: 192,589.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,801.30 : 458,811.30 = 128,362.70 : x
  2. Step 2: Convert to fraction form
    305,801.30/458,811.30 = 128,362.70/x
  3. Step 3: Cross multiply
    305,801.30x = 458,811.30 × 128,362.70
  4. Step 4: Simplify right side
    305,801.30x = 58,894,257,258.51
  5. Step 5: Solve for x
    x = 58,894,257,258.51/305,801.30
  6. Step 6: Final answer
    x = 192,589.95

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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.