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Finding the Fourth Proportional to 618,679.41, 853,897.33 and 403,445.81

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Solution

The fourth proportional to 618,679.41, 853,897.33 and 403,445.81 is: 556,833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,679.41 : 853,897.33 = 403,445.81 : x
  2. Step 2: Convert to fraction form
    618,679.41/853,897.33 = 403,445.81/x
  3. Step 3: Cross multiply
    618,679.41x = 853,897.33 × 403,445.81
  4. Step 4: Simplify right side
    618,679.41x = 344,501,295,689.20
  5. Step 5: Solve for x
    x = 344,501,295,689.20/618,679.41
  6. Step 6: Final answer
    x = 556,833.30

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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.