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Finding the Fourth Proportional to 643,926.23, 888,573.75 and 357,423.77

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Solution

The fourth proportional to 643,926.23, 888,573.75 and 357,423.77 is: 493,220.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,926.23 : 888,573.75 = 357,423.77 : x
  2. Step 2: Convert to fraction form
    643,926.23/888,573.75 = 357,423.77/x
  3. Step 3: Cross multiply
    643,926.23x = 888,573.75 × 357,423.77
  4. Step 4: Simplify right side
    643,926.23x = 317,597,375,205.17
  5. Step 5: Solve for x
    x = 317,597,375,205.17/643,926.23
  6. Step 6: Final answer
    x = 493,220.12

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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.