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Finding the Fourth Proportional to 619,821.71, 855,360.31 and 347,884.16

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Solution

The fourth proportional to 619,821.71, 855,360.31 and 347,884.16 is: 480,083.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,821.71 : 855,360.31 = 347,884.16 : x
  2. Step 2: Convert to fraction form
    619,821.71/855,360.31 = 347,884.16/x
  3. Step 3: Cross multiply
    619,821.71x = 855,360.31 × 347,884.16
  4. Step 4: Simplify right side
    619,821.71x = 297,566,302,941.69
  5. Step 5: Solve for x
    x = 297,566,302,941.69/619,821.71
  6. Step 6: Final answer
    x = 480,083.70

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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.