Home / 1,187,430.36-1,638,673.80-643,583.64

Finding the Fourth Proportional to 1,187,430.36, 1,638,673.80 and 643,583.64

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Solution

The fourth proportional to 1,187,430.36, 1,638,673.80 and 643,583.64 is: 888,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,430.36 : 1,638,673.80 = 643,583.64 : x
  2. Step 2: Convert to fraction form
    1,187,430.36/1,638,673.80 = 643,583.64/x
  3. Step 3: Cross multiply
    1,187,430.36x = 1,638,673.80 × 643,583.64
  4. Step 4: Simplify right side
    1,187,430.36x = 1,054,623,648,976.63
  5. Step 5: Solve for x
    x = 1,054,623,648,976.63/1,187,430.36
  6. Step 6: Final answer
    x = 888,156.21

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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.