Home / 1,389,018.34-1,916,755.13-777,065.36

Finding the Fourth Proportional to 1,389,018.34, 1,916,755.13 and 777,065.36

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Solution

The fourth proportional to 1,389,018.34, 1,916,755.13 and 777,065.36 is: 1,072,299.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,018.34 : 1,916,755.13 = 777,065.36 : x
  2. Step 2: Convert to fraction form
    1,389,018.34/1,916,755.13 = 777,065.36/x
  3. Step 3: Cross multiply
    1,389,018.34x = 1,916,755.13 × 777,065.36
  4. Step 4: Simplify right side
    1,389,018.34x = 1,489,444,011,239.97
  5. Step 5: Solve for x
    x = 1,489,444,011,239.97/1,389,018.34
  6. Step 6: Final answer
    x = 1,072,299.75

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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.