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Finding the Fourth Proportional to 323,489.60, 485,320.80 and 288,670.40

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Solution

The fourth proportional to 323,489.60, 485,320.80 and 288,670.40 is: 433,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,489.60 : 485,320.80 = 288,670.40 : x
  2. Step 2: Convert to fraction form
    323,489.60/485,320.80 = 288,670.40/x
  3. Step 3: Cross multiply
    323,489.60x = 485,320.80 × 288,670.40
  4. Step 4: Simplify right side
    323,489.60x = 140,097,749,464.32
  5. Step 5: Solve for x
    x = 140,097,749,464.32/323,489.60
  6. Step 6: Final answer
    x = 433,082.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.