Home / 1,389,962,888.84-1,918,186,244.75-817,785,881.31

Finding the Fourth Proportional to 1,389,962,888.84, 1,918,186,244.75 and 817,785,881.31

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Solution

The fourth proportional to 1,389,962,888.84, 1,918,186,244.75 and 817,785,881.31 is: 1,128,566,554.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,888.84 : 1,918,186,244.75 = 817,785,881.31 : x
  2. Step 2: Convert to fraction form
    1,389,962,888.84/1,918,186,244.75 = 817,785,881.31/x
  3. Step 3: Cross multiply
    1,389,962,888.84x = 1,918,186,244.75 × 817,785,881.31
  4. Step 4: Simplify right side
    1,389,962,888.84x = 1,568,665,628,675,508,992
  5. Step 5: Solve for x
    x = 1,568,665,628,675,508,992/1,389,962,888.84
  6. Step 6: Final answer
    x = 1,128,566,554.74

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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.