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Finding the Fourth Proportional to 354,861.42, 488,465.77 and 309,459.30

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Solution

The fourth proportional to 354,861.42, 488,465.77 and 309,459.30 is: 425,969.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,861.42 : 488,465.77 = 309,459.30 : x
  2. Step 2: Convert to fraction form
    354,861.42/488,465.77 = 309,459.30/x
  3. Step 3: Cross multiply
    354,861.42x = 488,465.77 × 309,459.30
  4. Step 4: Simplify right side
    354,861.42x = 151,160,273,233.00
  5. Step 5: Solve for x
    x = 151,160,273,233.00/354,861.42
  6. Step 6: Final answer
    x = 425,969.88

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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.