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Finding the Fourth Proportional to 619,539.28, 855,226.20 and 418,607.44

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Solution

The fourth proportional to 619,539.28, 855,226.20 and 418,607.44 is: 577,855.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,539.28 : 855,226.20 = 418,607.44 : x
  2. Step 2: Convert to fraction form
    619,539.28/855,226.20 = 418,607.44/x
  3. Step 3: Cross multiply
    619,539.28x = 855,226.20 × 418,607.44
  4. Step 4: Simplify right side
    619,539.28x = 358,004,050,202.93
  5. Step 5: Solve for x
    x = 358,004,050,202.93/619,539.28
  6. Step 6: Final answer
    x = 577,855.29

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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.