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Finding the Fourth Proportional to 643,807.64, 888,421.37 and 382,173.93

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Solution

The fourth proportional to 643,807.64, 888,421.37 and 382,173.93 is: 527,380.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,807.64 : 888,421.37 = 382,173.93 : x
  2. Step 2: Convert to fraction form
    643,807.64/888,421.37 = 382,173.93/x
  3. Step 3: Cross multiply
    643,807.64x = 888,421.37 × 382,173.93
  4. Step 4: Simplify right side
    643,807.64x = 339,531,484,558.01
  5. Step 5: Solve for x
    x = 339,531,484,558.01/643,807.64
  6. Step 6: Final answer
    x = 527,380.33

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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.