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Finding the Fourth Proportional to 606,978.20, 910,467.30 and 418,021.40

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Solution

The fourth proportional to 606,978.20, 910,467.30 and 418,021.40 is: 627,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,978.20 : 910,467.30 = 418,021.40 : x
  2. Step 2: Convert to fraction form
    606,978.20/910,467.30 = 418,021.40/x
  3. Step 3: Cross multiply
    606,978.20x = 910,467.30 × 418,021.40
  4. Step 4: Simplify right side
    606,978.20x = 380,594,815,400.22
  5. Step 5: Solve for x
    x = 380,594,815,400.22/606,978.20
  6. Step 6: Final answer
    x = 627,032.10

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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.