Home / 680,913.80-939,661.02-394,489.24

Finding the Fourth Proportional to 680,913.80, 939,661.02 and 394,489.24

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Solution

The fourth proportional to 680,913.80, 939,661.02 and 394,489.24 is: 544,395.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,913.80 : 939,661.02 = 394,489.24 : x
  2. Step 2: Convert to fraction form
    680,913.80/939,661.02 = 394,489.24/x
  3. Step 3: Cross multiply
    680,913.80x = 939,661.02 × 394,489.24
  4. Step 4: Simplify right side
    680,913.80x = 370,686,161,637.43
  5. Step 5: Solve for x
    x = 370,686,161,637.43/680,913.80
  6. Step 6: Final answer
    x = 544,395.14

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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.