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Finding the Fourth Proportional to 640,783.64, 884,245.74 and 354,286.52

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Solution

The fourth proportional to 640,783.64, 884,245.74 and 354,286.52 is: 488,895.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,783.64 : 884,245.74 = 354,286.52 : x
  2. Step 2: Convert to fraction form
    640,783.64/884,245.74 = 354,286.52/x
  3. Step 3: Cross multiply
    640,783.64x = 884,245.74 × 354,286.52
  4. Step 4: Simplify right side
    640,783.64x = 313,276,346,049.43
  5. Step 5: Solve for x
    x = 313,276,346,049.43/640,783.64
  6. Step 6: Final answer
    x = 488,895.67

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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.