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Finding the Fourth Proportional to 525,127.80, 786,525.30 and 455,143.80

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Solution

The fourth proportional to 525,127.80, 786,525.30 and 455,143.80 is: 681,704.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,127.80 : 786,525.30 = 455,143.80 : x
  2. Step 2: Convert to fraction form
    525,127.80/786,525.30 = 455,143.80/x
  3. Step 3: Cross multiply
    525,127.80x = 786,525.30 × 455,143.80
  4. Step 4: Simplify right side
    525,127.80x = 357,982,113,838.14
  5. Step 5: Solve for x
    x = 357,982,113,838.14/525,127.80
  6. Step 6: Final answer
    x = 681,704.75

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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.