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Finding the Fourth Proportional to 618,716.92, 853,815.12 and 360,577.40

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Solution

The fourth proportional to 618,716.92, 853,815.12 and 360,577.40 is: 497,588.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,716.92 : 853,815.12 = 360,577.40 : x
  2. Step 2: Convert to fraction form
    618,716.92/853,815.12 = 360,577.40/x
  3. Step 3: Cross multiply
    618,716.92x = 853,815.12 × 360,577.40
  4. Step 4: Simplify right side
    618,716.92x = 307,866,436,050.29
  5. Step 5: Solve for x
    x = 307,866,436,050.29/618,716.92
  6. Step 6: Final answer
    x = 497,588.52

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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.