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Finding the Fourth Proportional to 515,950.39, 711,987.57 and 286,522.21

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Solution

The fourth proportional to 515,950.39, 711,987.57 and 286,522.21 is: 395,387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,950.39 : 711,987.57 = 286,522.21 : x
  2. Step 2: Convert to fraction form
    515,950.39/711,987.57 = 286,522.21/x
  3. Step 3: Cross multiply
    515,950.39x = 711,987.57 × 286,522.21
  4. Step 4: Simplify right side
    515,950.39x = 204,000,252,048.93
  5. Step 5: Solve for x
    x = 204,000,252,048.93/515,950.39
  6. Step 6: Final answer
    x = 395,387.34

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Double scale
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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.