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Finding the Fourth Proportional to 922,212, 1,272,672 and 519,804

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Solution

The fourth proportional to 922,212, 1,272,672 and 519,804 is: 717,340.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,212 : 1,272,672 = 519,804 : x
  2. Step 2: Convert to fraction form
    922,212/1,272,672 = 519,804/x
  3. Step 3: Cross multiply
    922,212x = 1,272,672 × 519,804
  4. Step 4: Simplify right side
    922,212x = 661,539,996,288
  5. Step 5: Solve for x
    x = 661,539,996,288/922,212
  6. Step 6: Final answer
    x = 717,340.48

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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.