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Finding the Fourth Proportional to 619,243.70, 928,865.55 and 554,289.80

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Solution

The fourth proportional to 619,243.70, 928,865.55 and 554,289.80 is: 831,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,243.70 : 928,865.55 = 554,289.80 : x
  2. Step 2: Convert to fraction form
    619,243.70/928,865.55 = 554,289.80/x
  3. Step 3: Cross multiply
    619,243.70x = 928,865.55 × 554,289.80
  4. Step 4: Simplify right side
    619,243.70x = 514,860,699,936.39
  5. Step 5: Solve for x
    x = 514,860,699,936.39/619,243.70
  6. Step 6: Final answer
    x = 831,434.70

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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.