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Finding the Fourth Proportional to 488,843.60, 674,698.74 and 318,782.48

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Solution

The fourth proportional to 488,843.60, 674,698.74 and 318,782.48 is: 439,981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,843.60 : 674,698.74 = 318,782.48 : x
  2. Step 2: Convert to fraction form
    488,843.60/674,698.74 = 318,782.48/x
  3. Step 3: Cross multiply
    488,843.60x = 674,698.74 × 318,782.48
  4. Step 4: Simplify right side
    488,843.60x = 215,082,137,590.08
  5. Step 5: Solve for x
    x = 215,082,137,590.08/488,843.60
  6. Step 6: Final answer
    x = 439,981.49

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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.