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Finding the Fourth Proportional to 378,967.91, 522,985.22 and 215,615.41

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Solution

The fourth proportional to 378,967.91, 522,985.22 and 215,615.41 is: 297,554.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,967.91 : 522,985.22 = 215,615.41 : x
  2. Step 2: Convert to fraction form
    378,967.91/522,985.22 = 215,615.41/x
  3. Step 3: Cross multiply
    378,967.91x = 522,985.22 × 215,615.41
  4. Step 4: Simplify right side
    378,967.91x = 112,763,670,019.31
  5. Step 5: Solve for x
    x = 112,763,670,019.31/378,967.91
  6. Step 6: Final answer
    x = 297,554.67

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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.