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Finding the Fourth Proportional to 515,171.57, 710,979.23 and 285,802.70

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Solution

The fourth proportional to 515,171.57, 710,979.23 and 285,802.70 is: 394,431.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,171.57 : 710,979.23 = 285,802.70 : x
  2. Step 2: Convert to fraction form
    515,171.57/710,979.23 = 285,802.70/x
  3. Step 3: Cross multiply
    515,171.57x = 710,979.23 × 285,802.70
  4. Step 4: Simplify right side
    515,171.57x = 203,199,780,737.53
  5. Step 5: Solve for x
    x = 203,199,780,737.53/515,171.57
  6. Step 6: Final answer
    x = 394,431.28

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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.