Home / 642,393.05-962,538.32-388,905.23

Finding the Fourth Proportional to 642,393.05, 962,538.32 and 388,905.23

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Solution

The fourth proportional to 642,393.05, 962,538.32 and 388,905.23 is: 582,721.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,393.05 : 962,538.32 = 388,905.23 : x
  2. Step 2: Convert to fraction form
    642,393.05/962,538.32 = 388,905.23/x
  3. Step 3: Cross multiply
    642,393.05x = 962,538.32 × 388,905.23
  4. Step 4: Simplify right side
    642,393.05x = 374,336,190,102.02
  5. Step 5: Solve for x
    x = 374,336,190,102.02/642,393.05
  6. Step 6: Final answer
    x = 582,721.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.