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Finding the Fourth Proportional to 618,090.66, 928,556.93 and 436,140.23

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Solution

The fourth proportional to 618,090.66, 928,556.93 and 436,140.23 is: 655,212.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,090.66 : 928,556.93 = 436,140.23 : x
  2. Step 2: Convert to fraction form
    618,090.66/928,556.93 = 436,140.23/x
  3. Step 3: Cross multiply
    618,090.66x = 928,556.93 × 436,140.23
  4. Step 4: Simplify right side
    618,090.66x = 404,981,026,194.81
  5. Step 5: Solve for x
    x = 404,981,026,194.81/618,090.66
  6. Step 6: Final answer
    x = 655,212.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.