Home / 1,187,095.80-1,638,187.02-643,233.72

Finding the Fourth Proportional to 1,187,095.80, 1,638,187.02 and 643,233.72

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Solution

The fourth proportional to 1,187,095.80, 1,638,187.02 and 643,233.72 is: 887,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,095.80 : 1,638,187.02 = 643,233.72 : x
  2. Step 2: Convert to fraction form
    1,187,095.80/1,638,187.02 = 643,233.72/x
  3. Step 3: Cross multiply
    1,187,095.80x = 1,638,187.02 × 643,233.72
  4. Step 4: Simplify right side
    1,187,095.80x = 1,053,737,130,930.31
  5. Step 5: Solve for x
    x = 1,053,737,130,930.31/1,187,095.80
  6. Step 6: Final answer
    x = 887,659.72

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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.