Home / 1,208,999.57-1,668,419.39-665,123.68

Finding the Fourth Proportional to 1,208,999.57, 1,668,419.39 and 665,123.68

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Solution

The fourth proportional to 1,208,999.57, 1,668,419.39 and 665,123.68 is: 917,870.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,999.57 : 1,668,419.39 = 665,123.68 : x
  2. Step 2: Convert to fraction form
    1,208,999.57/1,668,419.39 = 665,123.68/x
  3. Step 3: Cross multiply
    1,208,999.57x = 1,668,419.39 × 665,123.68
  4. Step 4: Simplify right side
    1,208,999.57x = 1,109,705,236,963.49
  5. Step 5: Solve for x
    x = 1,109,705,236,963.49/1,208,999.57
  6. Step 6: Final answer
    x = 917,870.67

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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.