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Finding the Fourth Proportional to 703,361.64, 1,055,039.90 and 387,652.20

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Solution

The fourth proportional to 703,361.64, 1,055,039.90 and 387,652.20 is: 581,476.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,361.64 : 1,055,039.90 = 387,652.20 : x
  2. Step 2: Convert to fraction form
    703,361.64/1,055,039.90 = 387,652.20/x
  3. Step 3: Cross multiply
    703,361.64x = 1,055,039.90 × 387,652.20
  4. Step 4: Simplify right side
    703,361.64x = 408,988,538,322.78
  5. Step 5: Solve for x
    x = 408,988,538,322.78/703,361.64
  6. Step 6: Final answer
    x = 581,476.89

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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.