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Finding the Fourth Proportional to 354,851.84, 488,452.55 and 309,449.72

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Solution

The fourth proportional to 354,851.84, 488,452.55 and 309,449.72 is: 425,956.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,851.84 : 488,452.55 = 309,449.72 : x
  2. Step 2: Convert to fraction form
    354,851.84/488,452.55 = 309,449.72/x
  3. Step 3: Cross multiply
    354,851.84x = 488,452.55 × 309,449.72
  4. Step 4: Simplify right side
    354,851.84x = 151,151,504,368.11
  5. Step 5: Solve for x
    x = 151,151,504,368.11/354,851.84
  6. Step 6: Final answer
    x = 425,956.66

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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.