Home / 1,011,638,302.78-1,395,287,889.37-870,745,486.09

Finding the Fourth Proportional to 1,011,638,302.78, 1,395,287,889.37 and 870,745,486.09

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Solution

The fourth proportional to 1,011,638,302.78, 1,395,287,889.37 and 870,745,486.09 is: 1,200,963,455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011,638,302.78 : 1,395,287,889.37 = 870,745,486.09 : x
  2. Step 2: Convert to fraction form
    1,011,638,302.78/1,395,287,889.37 = 870,745,486.09/x
  3. Step 3: Cross multiply
    1,011,638,302.78x = 1,395,287,889.37 × 870,745,486.09
  4. Step 4: Simplify right side
    1,011,638,302.78x = 1,214,940,631,464,970,752
  5. Step 5: Solve for x
    x = 1,214,940,631,464,970,752/1,011,638,302.78
  6. Step 6: Final answer
    x = 1,200,963,455.15

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Double scale
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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.