Home / 1,388,645.16-1,916,239.92-776,691.90

Finding the Fourth Proportional to 1,388,645.16, 1,916,239.92 and 776,691.90

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Solution

The fourth proportional to 1,388,645.16, 1,916,239.92 and 776,691.90 is: 1,071,784.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,645.16 : 1,916,239.92 = 776,691.90 : x
  2. Step 2: Convert to fraction form
    1,388,645.16/1,916,239.92 = 776,691.90/x
  3. Step 3: Cross multiply
    1,388,645.16x = 1,916,239.92 × 776,691.90
  4. Step 4: Simplify right side
    1,388,645.16x = 1,488,328,024,320.65
  5. Step 5: Solve for x
    x = 1,488,328,024,320.65/1,388,645.16
  6. Step 6: Final answer
    x = 1,071,784.26

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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.