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Finding the Fourth Proportional to 1,392,663.07, 1,922,216.87 and 849,098.55

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Solution

The fourth proportional to 1,392,663.07, 1,922,216.87 and 849,098.55 is: 1,171,964.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,663.07 : 1,922,216.87 = 849,098.55 : x
  2. Step 2: Convert to fraction form
    1,392,663.07/1,922,216.87 = 849,098.55/x
  3. Step 3: Cross multiply
    1,392,663.07x = 1,922,216.87 × 849,098.55
  4. Step 4: Simplify right side
    1,392,663.07x = 1,632,151,555,621.13
  5. Step 5: Solve for x
    x = 1,632,151,555,621.13/1,392,663.07
  6. Step 6: Final answer
    x = 1,171,964.41

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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.