Home / 656,418.22-905,929.58-380,836.78

Finding the Fourth Proportional to 656,418.22, 905,929.58 and 380,836.78

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Solution

The fourth proportional to 656,418.22, 905,929.58 and 380,836.78 is: 525,596.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,418.22 : 905,929.58 = 380,836.78 : x
  2. Step 2: Convert to fraction form
    656,418.22/905,929.58 = 380,836.78/x
  3. Step 3: Cross multiply
    656,418.22x = 905,929.58 × 380,836.78
  4. Step 4: Simplify right side
    656,418.22x = 345,011,304,153.95
  5. Step 5: Solve for x
    x = 345,011,304,153.95/656,418.22
  6. Step 6: Final answer
    x = 525,596.78

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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.