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Finding the Fourth Proportional to 298,869.85, 448,172.75 and 85,589.41

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Solution

The fourth proportional to 298,869.85, 448,172.75 and 85,589.41 is: 128,346.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,869.85 : 448,172.75 = 85,589.41 : x
  2. Step 2: Convert to fraction form
    298,869.85/448,172.75 = 85,589.41/x
  3. Step 3: Cross multiply
    298,869.85x = 448,172.75 × 85,589.41
  4. Step 4: Simplify right side
    298,869.85x = 38,358,840,703.00
  5. Step 5: Solve for x
    x = 38,358,840,703.00/298,869.85
  6. Step 6: Final answer
    x = 128,346.30

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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.