Home / 678,621.96-936,573.21-388,260.45

Finding the Fourth Proportional to 678,621.96, 936,573.21 and 388,260.45

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Solution

The fourth proportional to 678,621.96, 936,573.21 and 388,260.45 is: 535,842.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,621.96 : 936,573.21 = 388,260.45 : x
  2. Step 2: Convert to fraction form
    678,621.96/936,573.21 = 388,260.45/x
  3. Step 3: Cross multiply
    678,621.96x = 936,573.21 × 388,260.45
  4. Step 4: Simplify right side
    678,621.96x = 363,634,335,972.55
  5. Step 5: Solve for x
    x = 363,634,335,972.55/678,621.96
  6. Step 6: Final answer
    x = 535,842.28

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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.