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Finding the Fourth Proportional to 1,355,777.78, 1,870,972.62 and 743,934.56

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Solution

The fourth proportional to 1,355,777.78, 1,870,972.62 and 743,934.56 is: 1,026,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,777.78 : 1,870,972.62 = 743,934.56 : x
  2. Step 2: Convert to fraction form
    1,355,777.78/1,870,972.62 = 743,934.56/x
  3. Step 3: Cross multiply
    1,355,777.78x = 1,870,972.62 × 743,934.56
  4. Step 4: Simplify right side
    1,355,777.78x = 1,391,881,194,719.42
  5. Step 5: Solve for x
    x = 1,391,881,194,719.42/1,355,777.78
  6. Step 6: Final answer
    x = 1,026,629.30

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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.