Home / 656,388.11-905,812.20-380,801.70

Finding the Fourth Proportional to 656,388.11, 905,812.20 and 380,801.70

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Solution

The fourth proportional to 656,388.11, 905,812.20 and 380,801.70 is: 525,504.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,388.11 : 905,812.20 = 380,801.70 : x
  2. Step 2: Convert to fraction form
    656,388.11/905,812.20 = 380,801.70/x
  3. Step 3: Cross multiply
    656,388.11x = 905,812.20 × 380,801.70
  4. Step 4: Simplify right side
    656,388.11x = 344,934,825,640.74
  5. Step 5: Solve for x
    x = 344,934,825,640.74/656,388.11
  6. Step 6: Final answer
    x = 525,504.38

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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.