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Finding the Fourth Proportional to 515,508.66, 711,400.50 and 286,100.58

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Solution

The fourth proportional to 515,508.66, 711,400.50 and 286,100.58 is: 394,818.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,508.66 : 711,400.50 = 286,100.58 : x
  2. Step 2: Convert to fraction form
    515,508.66/711,400.50 = 286,100.58/x
  3. Step 3: Cross multiply
    515,508.66x = 711,400.50 × 286,100.58
  4. Step 4: Simplify right side
    515,508.66x = 203,532,095,662.29
  5. Step 5: Solve for x
    x = 203,532,095,662.29/515,508.66
  6. Step 6: Final answer
    x = 394,818.00

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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.