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Finding the Fourth Proportional to 389,328.30, 584,101.80 and 189,655.20

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Solution

The fourth proportional to 389,328.30, 584,101.80 and 189,655.20 is: 284,536.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,328.30 : 584,101.80 = 189,655.20 : x
  2. Step 2: Convert to fraction form
    389,328.30/584,101.80 = 189,655.20/x
  3. Step 3: Cross multiply
    389,328.30x = 584,101.80 × 189,655.20
  4. Step 4: Simplify right side
    389,328.30x = 110,777,943,699.36
  5. Step 5: Solve for x
    x = 110,777,943,699.36/389,328.30
  6. Step 6: Final answer
    x = 284,536.07

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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.