Home / 1,231,389,745.56-1,699,296,846.15-666,870,040.12

Finding the Fourth Proportional to 1,231,389,745.56, 1,699,296,846.15 and 666,870,040.12

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Solution

The fourth proportional to 1,231,389,745.56, 1,699,296,846.15 and 666,870,040.12 is: 920,269,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,389,745.56 : 1,699,296,846.15 = 666,870,040.12 : x
  2. Step 2: Convert to fraction form
    1,231,389,745.56/1,699,296,846.15 = 666,870,040.12/x
  3. Step 3: Cross multiply
    1,231,389,745.56x = 1,699,296,846.15 × 666,870,040.12
  4. Step 4: Simplify right side
    1,231,389,745.56x = 1,133,210,155,967,840,000
  5. Step 5: Solve for x
    x = 1,133,210,155,967,840,000/1,231,389,745.56
  6. Step 6: Final answer
    x = 920,269,281.15

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Double scale
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1.5x scale

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.