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Finding the Fourth Proportional to 305,812.60, 458,718.90 and 221,394.40

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Solution

The fourth proportional to 305,812.60, 458,718.90 and 221,394.40 is: 332,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,812.60 : 458,718.90 = 221,394.40 : x
  2. Step 2: Convert to fraction form
    305,812.60/458,718.90 = 221,394.40/x
  3. Step 3: Cross multiply
    305,812.60x = 458,718.90 × 221,394.40
  4. Step 4: Simplify right side
    305,812.60x = 101,557,795,634.16
  5. Step 5: Solve for x
    x = 101,557,795,634.16/305,812.60
  6. Step 6: Final answer
    x = 332,091.60

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1.5x scale

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.