Home / 515,823.36-711,905.76-289,481.28

Finding the Fourth Proportional to 515,823.36, 711,905.76 and 289,481.28

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Solution

The fourth proportional to 515,823.36, 711,905.76 and 289,481.28 is: 399,523.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,823.36 : 711,905.76 = 289,481.28 : x
  2. Step 2: Convert to fraction form
    515,823.36/711,905.76 = 289,481.28/x
  3. Step 3: Cross multiply
    515,823.36x = 711,905.76 × 289,481.28
  4. Step 4: Simplify right side
    515,823.36x = 206,083,390,644.17
  5. Step 5: Solve for x
    x = 206,083,390,644.17/515,823.36
  6. Step 6: Final answer
    x = 399,523.18

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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.