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Finding the Fourth Proportional to 305,907.80, 458,861.70 and 81,302.90

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Solution

The fourth proportional to 305,907.80, 458,861.70 and 81,302.90 is: 121,954.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,907.80 : 458,861.70 = 81,302.90 : x
  2. Step 2: Convert to fraction form
    305,907.80/458,861.70 = 81,302.90/x
  3. Step 3: Cross multiply
    305,907.80x = 458,861.70 × 81,302.90
  4. Step 4: Simplify right side
    305,907.80x = 37,306,786,908.93
  5. Step 5: Solve for x
    x = 37,306,786,908.93/305,907.80
  6. Step 6: Final answer
    x = 121,954.35

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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.