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Finding the Fourth Proportional to 623,434.64, 859,765.78 and 393,592.62

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Solution

The fourth proportional to 623,434.64, 859,765.78 and 393,592.62 is: 542,795.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,434.64 : 859,765.78 = 393,592.62 : x
  2. Step 2: Convert to fraction form
    623,434.64/859,765.78 = 393,592.62/x
  3. Step 3: Cross multiply
    623,434.64x = 859,765.78 × 393,592.62
  4. Step 4: Simplify right side
    623,434.64x = 338,397,465,936.54
  5. Step 5: Solve for x
    x = 338,397,465,936.54/623,434.64
  6. Step 6: Final answer
    x = 542,795.42

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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.