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Finding the Fourth Proportional to 354,860.85, 488,465.00 and 309,458.73

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Solution

The fourth proportional to 354,860.85, 488,465.00 and 309,458.73 is: 425,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,860.85 : 488,465.00 = 309,458.73 : x
  2. Step 2: Convert to fraction form
    354,860.85/488,465.00 = 309,458.73/x
  3. Step 3: Cross multiply
    354,860.85x = 488,465.00 × 309,458.73
  4. Step 4: Simplify right side
    354,860.85x = 151,159,760,011.44
  5. Step 5: Solve for x
    x = 151,159,760,011.44/354,860.85
  6. Step 6: Final answer
    x = 425,969.10

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1.5x scale

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.