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Finding the Fourth Proportional to 619,749.18, 855,270.90 and 347,833.98

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Solution

The fourth proportional to 619,749.18, 855,270.90 and 347,833.98 is: 480,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,749.18 : 855,270.90 = 347,833.98 : x
  2. Step 2: Convert to fraction form
    619,749.18/855,270.90 = 347,833.98/x
  3. Step 3: Cross multiply
    619,749.18x = 855,270.90 × 347,833.98
  4. Step 4: Simplify right side
    619,749.18x = 297,492,281,125.18
  5. Step 5: Solve for x
    x = 297,492,281,125.18/619,749.18
  6. Step 6: Final answer
    x = 480,020.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.