Home / 1,200,445,945.38-1,656,579,824.64-664,621,491.15

Finding the Fourth Proportional to 1,200,445,945.38, 1,656,579,824.64 and 664,621,491.15

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Solution

The fourth proportional to 1,200,445,945.38, 1,656,579,824.64 and 664,621,491.15 is: 917,157,959.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,445,945.38 : 1,656,579,824.64 = 664,621,491.15 : x
  2. Step 2: Convert to fraction form
    1,200,445,945.38/1,656,579,824.64 = 664,621,491.15/x
  3. Step 3: Cross multiply
    1,200,445,945.38x = 1,656,579,824.64 × 664,621,491.15
  4. Step 4: Simplify right side
    1,200,445,945.38x = 1,100,998,553,261,242,368
  5. Step 5: Solve for x
    x = 1,100,998,553,261,242,368/1,200,445,945.38
  6. Step 6: Final answer
    x = 917,157,959.09

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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.