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Finding the Fourth Proportional to 899,912.16, 1,239,358.32 and 880,316.64

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Solution

The fourth proportional to 899,912.16, 1,239,358.32 and 880,316.64 is: 1,212,371.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,912.16 : 1,239,358.32 = 880,316.64 : x
  2. Step 2: Convert to fraction form
    899,912.16/1,239,358.32 = 880,316.64/x
  3. Step 3: Cross multiply
    899,912.16x = 1,239,358.32 × 880,316.64
  4. Step 4: Simplify right side
    899,912.16x = 1,091,027,752,018.44
  5. Step 5: Solve for x
    x = 1,091,027,752,018.44/899,912.16
  6. Step 6: Final answer
    x = 1,212,371.39

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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.