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Finding the Fourth Proportional to 515,952.75, 712,014.81 and 289,671.15

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Solution

The fourth proportional to 515,952.75, 712,014.81 and 289,671.15 is: 399,746.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,952.75 : 712,014.81 = 289,671.15 : x
  2. Step 2: Convert to fraction form
    515,952.75/712,014.81 = 289,671.15/x
  3. Step 3: Cross multiply
    515,952.75x = 712,014.81 × 289,671.15
  4. Step 4: Simplify right side
    515,952.75x = 206,250,148,829.73
  5. Step 5: Solve for x
    x = 206,250,148,829.73/515,952.75
  6. Step 6: Final answer
    x = 399,746.20

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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.