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Finding the Fourth Proportional to 619,420.80, 929,822.40 and 578,812.80

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Solution

The fourth proportional to 619,420.80, 929,822.40 and 578,812.80 is: 868,865.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,420.80 : 929,822.40 = 578,812.80 : x
  2. Step 2: Convert to fraction form
    619,420.80/929,822.40 = 578,812.80/x
  3. Step 3: Cross multiply
    619,420.80x = 929,822.40 × 578,812.80
  4. Step 4: Simplify right side
    619,420.80x = 538,193,106,846.72
  5. Step 5: Solve for x
    x = 538,193,106,846.72/619,420.80
  6. Step 6: Final answer
    x = 868,865.09

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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.