Home / 1,388,520.97-1,916,336.21-776,707.72

Finding the Fourth Proportional to 1,388,520.97, 1,916,336.21 and 776,707.72

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Solution

The fourth proportional to 1,388,520.97, 1,916,336.21 and 776,707.72 is: 1,071,955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,520.97 : 1,916,336.21 = 776,707.72 : x
  2. Step 2: Convert to fraction form
    1,388,520.97/1,916,336.21 = 776,707.72/x
  3. Step 3: Cross multiply
    1,388,520.97x = 1,916,336.21 × 776,707.72
  4. Step 4: Simplify right side
    1,388,520.97x = 1,488,433,128,422.54
  5. Step 5: Solve for x
    x = 1,488,433,128,422.54/1,388,520.97
  6. Step 6: Final answer
    x = 1,071,955.82

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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.