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Finding the Fourth Proportional to 1,393,004.86, 1,921,532.25 and 875,940.41

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Solution

The fourth proportional to 1,393,004.86, 1,921,532.25 and 875,940.41 is: 1,208,285.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,004.86 : 1,921,532.25 = 875,940.41 : x
  2. Step 2: Convert to fraction form
    1,393,004.86/1,921,532.25 = 875,940.41/x
  3. Step 3: Cross multiply
    1,393,004.86x = 1,921,532.25 × 875,940.41
  4. Step 4: Simplify right side
    1,393,004.86x = 1,683,147,754,981.83
  5. Step 5: Solve for x
    x = 1,683,147,754,981.83/1,393,004.86
  6. Step 6: Final answer
    x = 1,208,285.63

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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.