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Finding the Fourth Proportional to 405,311.80, 607,967.70 and 372,134.20

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Solution

The fourth proportional to 405,311.80, 607,967.70 and 372,134.20 is: 558,201.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,311.80 : 607,967.70 = 372,134.20 : x
  2. Step 2: Convert to fraction form
    405,311.80/607,967.70 = 372,134.20/x
  3. Step 3: Cross multiply
    405,311.80x = 607,967.70 × 372,134.20
  4. Step 4: Simplify right side
    405,311.80x = 226,245,573,665.34
  5. Step 5: Solve for x
    x = 226,245,573,665.34/405,311.80
  6. Step 6: Final answer
    x = 558,201.30

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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.