Home / 1,187,145.08-1,638,290.34-728,512.96

Finding the Fourth Proportional to 1,187,145.08, 1,638,290.34 and 728,512.96

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Solution

The fourth proportional to 1,187,145.08, 1,638,290.34 and 728,512.96 is: 1,005,366.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,145.08 : 1,638,290.34 = 728,512.96 : x
  2. Step 2: Convert to fraction form
    1,187,145.08/1,638,290.34 = 728,512.96/x
  3. Step 3: Cross multiply
    1,187,145.08x = 1,638,290.34 × 728,512.96
  4. Step 4: Simplify right side
    1,187,145.08x = 1,193,515,744,932.81
  5. Step 5: Solve for x
    x = 1,193,515,744,932.81/1,187,145.08
  6. Step 6: Final answer
    x = 1,005,366.37

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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.