Home / 663,761.68-915,975.92-405,637.61

Finding the Fourth Proportional to 663,761.68, 915,975.92 and 405,637.61

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Solution

The fourth proportional to 663,761.68, 915,975.92 and 405,637.61 is: 559,770.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,761.68 : 915,975.92 = 405,637.61 : x
  2. Step 2: Convert to fraction form
    663,761.68/915,975.92 = 405,637.61/x
  3. Step 3: Cross multiply
    663,761.68x = 915,975.92 × 405,637.61
  4. Step 4: Simplify right side
    663,761.68x = 371,554,283,268.10
  5. Step 5: Solve for x
    x = 371,554,283,268.10/663,761.68
  6. Step 6: Final answer
    x = 559,770.62

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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.