Home / 1,188,530.76-1,640,160.38-644,654.87

Finding the Fourth Proportional to 1,188,530.76, 1,640,160.38 and 644,654.87

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Solution

The fourth proportional to 1,188,530.76, 1,640,160.38 and 644,654.87 is: 889,617.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,530.76 : 1,640,160.38 = 644,654.87 : x
  2. Step 2: Convert to fraction form
    1,188,530.76/1,640,160.38 = 644,654.87/x
  3. Step 3: Cross multiply
    1,188,530.76x = 1,640,160.38 × 644,654.87
  4. Step 4: Simplify right side
    1,188,530.76x = 1,057,337,376,548.05
  5. Step 5: Solve for x
    x = 1,057,337,376,548.05/1,188,530.76
  6. Step 6: Final answer
    x = 889,617.17

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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.