Home / 1,187,197.29-1,638,333.63-643,328.33

Finding the Fourth Proportional to 1,187,197.29, 1,638,333.63 and 643,328.33

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Solution

The fourth proportional to 1,187,197.29, 1,638,333.63 and 643,328.33 is: 887,793.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,197.29 : 1,638,333.63 = 643,328.33 : x
  2. Step 2: Convert to fraction form
    1,187,197.29/1,638,333.63 = 643,328.33/x
  3. Step 3: Cross multiply
    1,187,197.29x = 1,638,333.63 × 643,328.33
  4. Step 4: Simplify right side
    1,187,197.29x = 1,053,986,429,979.07
  5. Step 5: Solve for x
    x = 1,053,986,429,979.07/1,187,197.29
  6. Step 6: Final answer
    x = 887,793.83

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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.