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Finding the Fourth Proportional to 839,361.63, 1,158,320.53 and 457,388.42

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Solution

The fourth proportional to 839,361.63, 1,158,320.53 and 457,388.42 is: 631,196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,361.63 : 1,158,320.53 = 457,388.42 : x
  2. Step 2: Convert to fraction form
    839,361.63/1,158,320.53 = 457,388.42/x
  3. Step 3: Cross multiply
    839,361.63x = 1,158,320.53 × 457,388.42
  4. Step 4: Simplify right side
    839,361.63x = 529,802,388,991.72
  5. Step 5: Solve for x
    x = 529,802,388,991.72/839,361.63
  6. Step 6: Final answer
    x = 631,196.82

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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.