Home / 1,187,148.88-1,638,295.52-728,516.72

Finding the Fourth Proportional to 1,187,148.88, 1,638,295.52 and 728,516.72

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Solution

The fourth proportional to 1,187,148.88, 1,638,295.52 and 728,516.72 is: 1,005,371.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,148.88 : 1,638,295.52 = 728,516.72 : x
  2. Step 2: Convert to fraction form
    1,187,148.88/1,638,295.52 = 728,516.72/x
  3. Step 3: Cross multiply
    1,187,148.88x = 1,638,295.52 × 728,516.72
  4. Step 4: Simplify right side
    1,187,148.88x = 1,193,525,678,621.09
  5. Step 5: Solve for x
    x = 1,193,525,678,621.09/1,187,148.88
  6. Step 6: Final answer
    x = 1,005,371.52

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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.