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Finding the Fourth Proportional to 640,222.05, 883,504.60 and 353,740.09

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Solution

The fourth proportional to 640,222.05, 883,504.60 and 353,740.09 is: 488,160.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,222.05 : 883,504.60 = 353,740.09 : x
  2. Step 2: Convert to fraction form
    640,222.05/883,504.60 = 353,740.09/x
  3. Step 3: Cross multiply
    640,222.05x = 883,504.60 × 353,740.09
  4. Step 4: Simplify right side
    640,222.05x = 312,530,996,719.41
  5. Step 5: Solve for x
    x = 312,530,996,719.41/640,222.05
  6. Step 6: Final answer
    x = 488,160.31

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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.