Home / 515,904.31-711,947.94-289,549.81

Finding the Fourth Proportional to 515,904.31, 711,947.94 and 289,549.81

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Solution

The fourth proportional to 515,904.31, 711,947.94 and 289,549.81 is: 399,578.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,904.31 : 711,947.94 = 289,549.81 : x
  2. Step 2: Convert to fraction form
    515,904.31/711,947.94 = 289,549.81/x
  3. Step 3: Cross multiply
    515,904.31x = 711,947.94 × 289,549.81
  4. Step 4: Simplify right side
    515,904.31x = 206,144,388,977.02
  5. Step 5: Solve for x
    x = 206,144,388,977.02/515,904.31
  6. Step 6: Final answer
    x = 399,578.73

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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.