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Finding the Fourth Proportional to 515,611.10, 711,532.61 and 286,155.06

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Solution

The fourth proportional to 515,611.10, 711,532.61 and 286,155.06 is: 394,888.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,611.10 : 711,532.61 = 286,155.06 : x
  2. Step 2: Convert to fraction form
    515,611.10/711,532.61 = 286,155.06/x
  3. Step 3: Cross multiply
    515,611.10x = 711,532.61 × 286,155.06
  4. Step 4: Simplify right side
    515,611.10x = 203,608,656,706.51
  5. Step 5: Solve for x
    x = 203,608,656,706.51/515,611.10
  6. Step 6: Final answer
    x = 394,888.04

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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.