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Finding the Fourth Proportional to 383,064.22, 528,623.62 and 210,978.91

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Solution

The fourth proportional to 383,064.22, 528,623.62 and 210,978.91 is: 291,148.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,064.22 : 528,623.62 = 210,978.91 : x
  2. Step 2: Convert to fraction form
    383,064.22/528,623.62 = 210,978.91/x
  3. Step 3: Cross multiply
    383,064.22x = 528,623.62 × 210,978.91
  4. Step 4: Simplify right side
    383,064.22x = 111,528,435,147.85
  5. Step 5: Solve for x
    x = 111,528,435,147.85/383,064.22
  6. Step 6: Final answer
    x = 291,148.14

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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.