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Finding the Fourth Proportional to 515,553.66, 711,496.71 and 289,213.74

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Solution

The fourth proportional to 515,553.66, 711,496.71 and 289,213.74 is: 399,133.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,553.66 : 711,496.71 = 289,213.74 : x
  2. Step 2: Convert to fraction form
    515,553.66/711,496.71 = 289,213.74/x
  3. Step 3: Cross multiply
    515,553.66x = 711,496.71 × 289,213.74
  4. Step 4: Simplify right side
    515,553.66x = 205,774,624,496.80
  5. Step 5: Solve for x
    x = 205,774,624,496.80/515,553.66
  6. Step 6: Final answer
    x = 399,133.28

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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.