Home / 656,385.10-905,979.96-427,512.70

Finding the Fourth Proportional to 656,385.10, 905,979.96 and 427,512.70

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Solution

The fourth proportional to 656,385.10, 905,979.96 and 427,512.70 is: 590,077.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,385.10 : 905,979.96 = 427,512.70 : x
  2. Step 2: Convert to fraction form
    656,385.10/905,979.96 = 427,512.70/x
  3. Step 3: Cross multiply
    656,385.10x = 905,979.96 × 427,512.70
  4. Step 4: Simplify right side
    656,385.10x = 387,317,938,845.49
  5. Step 5: Solve for x
    x = 387,317,938,845.49/656,385.10
  6. Step 6: Final answer
    x = 590,077.29

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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.