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Finding the Fourth Proportional to 618,354.44, 853,746.38 and 386,136.15

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Solution

The fourth proportional to 618,354.44, 853,746.38 and 386,136.15 is: 533,128.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,354.44 : 853,746.38 = 386,136.15 : x
  2. Step 2: Convert to fraction form
    618,354.44/853,746.38 = 386,136.15/x
  3. Step 3: Cross multiply
    618,354.44x = 853,746.38 × 386,136.15
  4. Step 4: Simplify right side
    618,354.44x = 329,662,338,318.96
  5. Step 5: Solve for x
    x = 329,662,338,318.96/618,354.44
  6. Step 6: Final answer
    x = 533,128.44

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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.