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Finding the Fourth Proportional to 627,256.90, 865,609.90 and 340,779.34

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Solution

The fourth proportional to 627,256.90, 865,609.90 and 340,779.34 is: 470,272.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,256.90 : 865,609.90 = 340,779.34 : x
  2. Step 2: Convert to fraction form
    627,256.90/865,609.90 = 340,779.34/x
  3. Step 3: Cross multiply
    627,256.90x = 865,609.90 × 340,779.34
  4. Step 4: Simplify right side
    627,256.90x = 294,981,970,419.47
  5. Step 5: Solve for x
    x = 294,981,970,419.47/627,256.90
  6. Step 6: Final answer
    x = 470,272.98

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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.