Home / 1,388,965.20-1,916,762.76-785,355.60

Finding the Fourth Proportional to 1,388,965.20, 1,916,762.76 and 785,355.60

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Solution

The fourth proportional to 1,388,965.20, 1,916,762.76 and 785,355.60 is: 1,083,785.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,965.20 : 1,916,762.76 = 785,355.60 : x
  2. Step 2: Convert to fraction form
    1,388,965.20/1,916,762.76 = 785,355.60/x
  3. Step 3: Cross multiply
    1,388,965.20x = 1,916,762.76 × 785,355.60
  4. Step 4: Simplify right side
    1,388,965.20x = 1,505,340,367,437.46
  5. Step 5: Solve for x
    x = 1,505,340,367,437.46/1,388,965.20
  6. Step 6: Final answer
    x = 1,083,785.52

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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.