Home / 1,187,931,296.78-1,781,965,040.61-314,509,969.28

Finding the Fourth Proportional to 1,187,931,296.78, 1,781,965,040.61 and 314,509,969.28

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Solution

The fourth proportional to 1,187,931,296.78, 1,781,965,040.61 and 314,509,969.28 is: 471,782,982.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,931,296.78 : 1,781,965,040.61 = 314,509,969.28 : x
  2. Step 2: Convert to fraction form
    1,187,931,296.78/1,781,965,040.61 = 314,509,969.28/x
  3. Step 3: Cross multiply
    1,187,931,296.78x = 1,781,965,040.61 × 314,509,969.28
  4. Step 4: Simplify right side
    1,187,931,296.78x = 560,445,770,180,284,992
  5. Step 5: Solve for x
    x = 560,445,770,180,284,992/1,187,931,296.78
  6. Step 6: Final answer
    x = 471,782,982.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.