Home / 1,187,601.55-1,638,911.14-643,755.40

Finding the Fourth Proportional to 1,187,601.55, 1,638,911.14 and 643,755.40

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Solution

The fourth proportional to 1,187,601.55, 1,638,911.14 and 643,755.40 is: 888,393.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,601.55 : 1,638,911.14 = 643,755.40 : x
  2. Step 2: Convert to fraction form
    1,187,601.55/1,638,911.14 = 643,755.40/x
  3. Step 3: Cross multiply
    1,187,601.55x = 1,638,911.14 × 643,755.40
  4. Step 4: Simplify right side
    1,187,601.55x = 1,055,057,896,495.16
  5. Step 5: Solve for x
    x = 1,055,057,896,495.16/1,187,601.55
  6. Step 6: Final answer
    x = 888,393.84

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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.