Home / 656,384.60-905,979.27-427,512.20

Finding the Fourth Proportional to 656,384.60, 905,979.27 and 427,512.20

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Solution

The fourth proportional to 656,384.60, 905,979.27 and 427,512.20 is: 590,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,384.60 : 905,979.27 = 427,512.20 : x
  2. Step 2: Convert to fraction form
    656,384.60/905,979.27 = 427,512.20/x
  3. Step 3: Cross multiply
    656,384.60x = 905,979.27 × 427,512.20
  4. Step 4: Simplify right side
    656,384.60x = 387,317,190,872.09
  5. Step 5: Solve for x
    x = 387,317,190,872.09/656,384.60
  6. Step 6: Final answer
    x = 590,076.60

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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.