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Finding the Fourth Proportional to 1,296,920.03, 1,789,513.69 and 910,914.89

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Solution

The fourth proportional to 1,296,920.03, 1,789,513.69 and 910,914.89 is: 1,256,896.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,920.03 : 1,789,513.69 = 910,914.89 : x
  2. Step 2: Convert to fraction form
    1,296,920.03/1,789,513.69 = 910,914.89/x
  3. Step 3: Cross multiply
    1,296,920.03x = 1,789,513.69 × 910,914.89
  4. Step 4: Simplify right side
    1,296,920.03x = 1,630,094,666,079.84
  5. Step 5: Solve for x
    x = 1,630,094,666,079.84/1,296,920.03
  6. Step 6: Final answer
    x = 1,256,896.82

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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.