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Finding the Fourth Proportional to 298,370.20, 447,401.40 and 87,980.80

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Solution

The fourth proportional to 298,370.20, 447,401.40 and 87,980.80 is: 131,925.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,370.20 : 447,401.40 = 87,980.80 : x
  2. Step 2: Convert to fraction form
    298,370.20/447,401.40 = 87,980.80/x
  3. Step 3: Cross multiply
    298,370.20x = 447,401.40 × 87,980.80
  4. Step 4: Simplify right side
    298,370.20x = 39,362,733,093.12
  5. Step 5: Solve for x
    x = 39,362,733,093.12/298,370.20
  6. Step 6: Final answer
    x = 131,925.82

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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.