Home / 1,385,481.76-1,912,283.59-812,706.46

Finding the Fourth Proportional to 1,385,481.76, 1,912,283.59 and 812,706.46

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Solution

The fourth proportional to 1,385,481.76, 1,912,283.59 and 812,706.46 is: 1,121,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,481.76 : 1,912,283.59 = 812,706.46 : x
  2. Step 2: Convert to fraction form
    1,385,481.76/1,912,283.59 = 812,706.46/x
  3. Step 3: Cross multiply
    1,385,481.76x = 1,912,283.59 × 812,706.46
  4. Step 4: Simplify right side
    1,385,481.76x = 1,554,125,226,944.99
  5. Step 5: Solve for x
    x = 1,554,125,226,944.99/1,385,481.76
  6. Step 6: Final answer
    x = 1,121,721.90

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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.