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Finding the Fourth Proportional to 690,171.58, 952,190.29 and 399,624.58

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Solution

The fourth proportional to 690,171.58, 952,190.29 and 399,624.58 is: 551,339.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,171.58 : 952,190.29 = 399,624.58 : x
  2. Step 2: Convert to fraction form
    690,171.58/952,190.29 = 399,624.58/x
  3. Step 3: Cross multiply
    690,171.58x = 952,190.29 × 399,624.58
  4. Step 4: Simplify right side
    690,171.58x = 380,518,642,723.21
  5. Step 5: Solve for x
    x = 380,518,642,723.21/690,171.58
  6. Step 6: Final answer
    x = 551,339.19

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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.