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Finding the Fourth Proportional to 318,525.51, 439,542.54 and 189,456.87

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Solution

The fourth proportional to 318,525.51, 439,542.54 and 189,456.87 is: 261,437.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,525.51 : 439,542.54 = 189,456.87 : x
  2. Step 2: Convert to fraction form
    318,525.51/439,542.54 = 189,456.87/x
  3. Step 3: Cross multiply
    318,525.51x = 439,542.54 × 189,456.87
  4. Step 4: Simplify right side
    318,525.51x = 83,274,353,860.25
  5. Step 5: Solve for x
    x = 83,274,353,860.25/318,525.51
  6. Step 6: Final answer
    x = 261,437.00

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1.5x scale

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.