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Finding the Fourth Proportional to 643,597.78, 888,171.06 and 357,144.52

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Solution

The fourth proportional to 643,597.78, 888,171.06 and 357,144.52 is: 492,862.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,597.78 : 888,171.06 = 357,144.52 : x
  2. Step 2: Convert to fraction form
    643,597.78/888,171.06 = 357,144.52/x
  3. Step 3: Cross multiply
    643,597.78x = 888,171.06 × 357,144.52
  4. Step 4: Simplify right side
    643,597.78x = 317,205,426,901.59
  5. Step 5: Solve for x
    x = 317,205,426,901.59/643,597.78
  6. Step 6: Final answer
    x = 492,862.84

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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.