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Finding the Fourth Proportional to 383,118.72, 528,683.13 and 211,030.98

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Solution

The fourth proportional to 383,118.72, 528,683.13 and 211,030.98 is: 291,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,118.72 : 528,683.13 = 211,030.98 : x
  2. Step 2: Convert to fraction form
    383,118.72/528,683.13 = 211,030.98/x
  3. Step 3: Cross multiply
    383,118.72x = 528,683.13 × 211,030.98
  4. Step 4: Simplify right side
    383,118.72x = 111,568,519,033.37
  5. Step 5: Solve for x
    x = 111,568,519,033.37/383,118.72
  6. Step 6: Final answer
    x = 291,211.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.