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Finding the Fourth Proportional to 488,844.60, 674,700.12 and 318,783.48

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Solution

The fourth proportional to 488,844.60, 674,700.12 and 318,783.48 is: 439,982.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,844.60 : 674,700.12 = 318,783.48 : x
  2. Step 2: Convert to fraction form
    488,844.60/674,700.12 = 318,783.48/x
  3. Step 3: Cross multiply
    488,844.60x = 674,700.12 × 318,783.48
  4. Step 4: Simplify right side
    488,844.60x = 215,083,252,210.02
  5. Step 5: Solve for x
    x = 215,083,252,210.02/488,844.60
  6. Step 6: Final answer
    x = 439,982.87

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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.