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Finding the Fourth Proportional to 1,392,531.73, 1,922,323.47 and 877,043.21

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Solution

The fourth proportional to 1,392,531.73, 1,922,323.47 and 877,043.21 is: 1,210,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,531.73 : 1,922,323.47 = 877,043.21 : x
  2. Step 2: Convert to fraction form
    1,392,531.73/1,922,323.47 = 877,043.21/x
  3. Step 3: Cross multiply
    1,392,531.73x = 1,922,323.47 × 877,043.21
  4. Step 4: Simplify right side
    1,392,531.73x = 1,685,960,733,886.61
  5. Step 5: Solve for x
    x = 1,685,960,733,886.61/1,392,531.73
  6. Step 6: Final answer
    x = 1,210,716.21

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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.