Home / 691,721.04-954,589.64-389,914.96

Finding the Fourth Proportional to 691,721.04, 954,589.64 and 389,914.96

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Solution

The fourth proportional to 691,721.04, 954,589.64 and 389,914.96 is: 538,090.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,721.04 : 954,589.64 = 389,914.96 : x
  2. Step 2: Convert to fraction form
    691,721.04/954,589.64 = 389,914.96/x
  3. Step 3: Cross multiply
    691,721.04x = 954,589.64 × 389,914.96
  4. Step 4: Simplify right side
    691,721.04x = 372,208,781,297.01
  5. Step 5: Solve for x
    x = 372,208,781,297.01/691,721.04
  6. Step 6: Final answer
    x = 538,090.88

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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.