Home / 1,515,039.72-2,090,005.86-991,440.36

Finding the Fourth Proportional to 1,515,039.72, 2,090,005.86 and 991,440.36

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Solution

The fourth proportional to 1,515,039.72, 2,090,005.86 and 991,440.36 is: 1,367,697.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515,039.72 : 2,090,005.86 = 991,440.36 : x
  2. Step 2: Convert to fraction form
    1,515,039.72/2,090,005.86 = 991,440.36/x
  3. Step 3: Cross multiply
    1,515,039.72x = 2,090,005.86 × 991,440.36
  4. Step 4: Simplify right side
    1,515,039.72x = 2,072,116,162,240.51
  5. Step 5: Solve for x
    x = 2,072,116,162,240.51/1,515,039.72
  6. Step 6: Final answer
    x = 1,367,697.58

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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.