Home / 1,388,455.40-1,916,245.94-776,642.14

Finding the Fourth Proportional to 1,388,455.40, 1,916,245.94 and 776,642.14

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Solution

The fourth proportional to 1,388,455.40, 1,916,245.94 and 776,642.14 is: 1,071,865.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,455.40 : 1,916,245.94 = 776,642.14 : x
  2. Step 2: Convert to fraction form
    1,388,455.40/1,916,245.94 = 776,642.14/x
  3. Step 3: Cross multiply
    1,388,455.40x = 1,916,245.94 × 776,642.14
  4. Step 4: Simplify right side
    1,388,455.40x = 1,488,237,347,607.91
  5. Step 5: Solve for x
    x = 1,488,237,347,607.91/1,388,455.40
  6. Step 6: Final answer
    x = 1,071,865.43

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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.