Home / 1,231,389,778.65-1,699,296,891.94-666,870,073.20

Finding the Fourth Proportional to 1,231,389,778.65, 1,699,296,891.94 and 666,870,073.20

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Solution

The fourth proportional to 1,231,389,778.65, 1,699,296,891.94 and 666,870,073.20 is: 920,269,326.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,389,778.65 : 1,699,296,891.94 = 666,870,073.20 : x
  2. Step 2: Convert to fraction form
    1,231,389,778.65/1,699,296,891.94 = 666,870,073.20/x
  3. Step 3: Cross multiply
    1,231,389,778.65x = 1,699,296,891.94 × 666,870,073.20
  4. Step 4: Simplify right side
    1,231,389,778.65x = 1,133,210,242,721,831,296
  5. Step 5: Solve for x
    x = 1,133,210,242,721,831,296/1,231,389,778.65
  6. Step 6: Final answer
    x = 920,269,326.88

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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.