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Finding the Fourth Proportional to 521,034.60, 781,551.90 and 188,567.40

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Solution

The fourth proportional to 521,034.60, 781,551.90 and 188,567.40 is: 282,851.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,034.60 : 781,551.90 = 188,567.40 : x
  2. Step 2: Convert to fraction form
    521,034.60/781,551.90 = 188,567.40/x
  3. Step 3: Cross multiply
    521,034.60x = 781,551.90 × 188,567.40
  4. Step 4: Simplify right side
    521,034.60x = 147,375,209,748.06
  5. Step 5: Solve for x
    x = 147,375,209,748.06/521,034.60
  6. Step 6: Final answer
    x = 282,851.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.