Home / 1,390,457.52-2,085,161.37-641,978.64

Finding the Fourth Proportional to 1,390,457.52, 2,085,161.37 and 641,978.64

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Solution

The fourth proportional to 1,390,457.52, 2,085,161.37 and 641,978.64 is: 962,725.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,457.52 : 2,085,161.37 = 641,978.64 : x
  2. Step 2: Convert to fraction form
    1,390,457.52/2,085,161.37 = 641,978.64/x
  3. Step 3: Cross multiply
    1,390,457.52x = 2,085,161.37 × 641,978.64
  4. Step 4: Simplify right side
    1,390,457.52x = 1,338,629,060,493.14
  5. Step 5: Solve for x
    x = 1,338,629,060,493.14/1,390,457.52
  6. Step 6: Final answer
    x = 962,725.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.