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Finding the Fourth Proportional to 525,003.40, 786,986.70 and 258,545.80

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Solution

The fourth proportional to 525,003.40, 786,986.70 and 258,545.80 is: 387,563.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,003.40 : 786,986.70 = 258,545.80 : x
  2. Step 2: Convert to fraction form
    525,003.40/786,986.70 = 258,545.80/x
  3. Step 3: Cross multiply
    525,003.40x = 786,986.70 × 258,545.80
  4. Step 4: Simplify right side
    525,003.40x = 203,472,105,940.86
  5. Step 5: Solve for x
    x = 203,472,105,940.86/525,003.40
  6. Step 6: Final answer
    x = 387,563.41

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1.5x scale

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.