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Finding the Fourth Proportional to 578,432.09, 866,518.16 and 398,485.73

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Solution

The fourth proportional to 578,432.09, 866,518.16 and 398,485.73 is: 596,950.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,432.09 : 866,518.16 = 398,485.73 : x
  2. Step 2: Convert to fraction form
    578,432.09/866,518.16 = 398,485.73/x
  3. Step 3: Cross multiply
    578,432.09x = 866,518.16 × 398,485.73
  4. Step 4: Simplify right side
    578,432.09x = 345,295,115,220.84
  5. Step 5: Solve for x
    x = 345,295,115,220.84/578,432.09
  6. Step 6: Final answer
    x = 596,950.14

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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.