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Finding the Fourth Proportional to 705,279.54, 973,297.38 and 399,347.85

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Solution

The fourth proportional to 705,279.54, 973,297.38 and 399,347.85 is: 551,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,279.54 : 973,297.38 = 399,347.85 : x
  2. Step 2: Convert to fraction form
    705,279.54/973,297.38 = 399,347.85/x
  3. Step 3: Cross multiply
    705,279.54x = 973,297.38 × 399,347.85
  4. Step 4: Simplify right side
    705,279.54x = 388,684,216,113.63
  5. Step 5: Solve for x
    x = 388,684,216,113.63/705,279.54
  6. Step 6: Final answer
    x = 551,106.61

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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.