Home / 1,388,456.46-1,916,247.38-776,643.21

Finding the Fourth Proportional to 1,388,456.46, 1,916,247.38 and 776,643.21

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Solution

The fourth proportional to 1,388,456.46, 1,916,247.38 and 776,643.21 is: 1,071,866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,456.46 : 1,916,247.38 = 776,643.21 : x
  2. Step 2: Convert to fraction form
    1,388,456.46/1,916,247.38 = 776,643.21/x
  3. Step 3: Cross multiply
    1,388,456.46x = 1,916,247.38 × 776,643.21
  4. Step 4: Simplify right side
    1,388,456.46x = 1,488,240,512,474.07
  5. Step 5: Solve for x
    x = 1,488,240,512,474.07/1,388,456.46
  6. Step 6: Final answer
    x = 1,071,866.89

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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.