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Finding the Fourth Proportional to 693,209.70, 956,618.55 and 387,290.30

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Solution

The fourth proportional to 693,209.70, 956,618.55 and 387,290.30 is: 534,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,209.70 : 956,618.55 = 387,290.30 : x
  2. Step 2: Convert to fraction form
    693,209.70/956,618.55 = 387,290.30/x
  3. Step 3: Cross multiply
    693,209.70x = 956,618.55 × 387,290.30
  4. Step 4: Simplify right side
    693,209.70x = 370,489,080,431.97
  5. Step 5: Solve for x
    x = 370,489,080,431.97/693,209.70
  6. Step 6: Final answer
    x = 534,454.55

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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.