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Finding the Fourth Proportional to 640,676.52, 884,056.68 and 354,157.38

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Solution

The fourth proportional to 640,676.52, 884,056.68 and 354,157.38 is: 488,694.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,676.52 : 884,056.68 = 354,157.38 : x
  2. Step 2: Convert to fraction form
    640,676.52/884,056.68 = 354,157.38/x
  3. Step 3: Cross multiply
    640,676.52x = 884,056.68 × 354,157.38
  4. Step 4: Simplify right side
    640,676.52x = 313,095,197,560.30
  5. Step 5: Solve for x
    x = 313,095,197,560.30/640,676.52
  6. Step 6: Final answer
    x = 488,694.67

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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.