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Finding the Fourth Proportional to 918,589.21, 1,375,889.69 and 444,279.94

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Solution

The fourth proportional to 918,589.21, 1,375,889.69 and 444,279.94 is: 665,455.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,589.21 : 1,375,889.69 = 444,279.94 : x
  2. Step 2: Convert to fraction form
    918,589.21/1,375,889.69 = 444,279.94/x
  3. Step 3: Cross multiply
    918,589.21x = 1,375,889.69 × 444,279.94
  4. Step 4: Simplify right side
    918,589.21x = 611,280,186,590.79
  5. Step 5: Solve for x
    x = 611,280,186,590.79/918,589.21
  6. Step 6: Final answer
    x = 665,455.44

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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.