Home / 1,388,504.85-1,916,314.16-776,691.60

Finding the Fourth Proportional to 1,388,504.85, 1,916,314.16 and 776,691.60

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Solution

The fourth proportional to 1,388,504.85, 1,916,314.16 and 776,691.60 is: 1,071,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,504.85 : 1,916,314.16 = 776,691.60 : x
  2. Step 2: Convert to fraction form
    1,388,504.85/1,916,314.16 = 776,691.60/x
  3. Step 3: Cross multiply
    1,388,504.85x = 1,916,314.16 × 776,691.60
  4. Step 4: Simplify right side
    1,388,504.85x = 1,488,385,107,149.60
  5. Step 5: Solve for x
    x = 1,488,385,107,149.60/1,388,504.85
  6. Step 6: Final answer
    x = 1,071,933.68

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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.