Home / 515,836.13-711,919.49-289,481.63

Finding the Fourth Proportional to 515,836.13, 711,919.49 and 289,481.63

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Solution

The fourth proportional to 515,836.13, 711,919.49 and 289,481.63 is: 399,521.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,836.13 : 711,919.49 = 289,481.63 : x
  2. Step 2: Convert to fraction form
    515,836.13/711,919.49 = 289,481.63/x
  3. Step 3: Cross multiply
    515,836.13x = 711,919.49 × 289,481.63
  4. Step 4: Simplify right side
    515,836.13x = 206,087,609,386.96
  5. Step 5: Solve for x
    x = 206,087,609,386.96/515,836.13
  6. Step 6: Final answer
    x = 399,521.47

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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.