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Finding the Fourth Proportional to 618,323.83, 853,279.01 and 346,386.78

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Solution

The fourth proportional to 618,323.83, 853,279.01 and 346,386.78 is: 478,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,323.83 : 853,279.01 = 346,386.78 : x
  2. Step 2: Convert to fraction form
    618,323.83/853,279.01 = 346,386.78/x
  3. Step 3: Cross multiply
    618,323.83x = 853,279.01 × 346,386.78
  4. Step 4: Simplify right side
    618,323.83x = 295,564,568,282.50
  5. Step 5: Solve for x
    x = 295,564,568,282.50/618,323.83
  6. Step 6: Final answer
    x = 478,009.35

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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.