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Finding the Fourth Proportional to 258,714.05, 388,071.15 and 116,393.10

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Solution

The fourth proportional to 258,714.05, 388,071.15 and 116,393.10 is: 174,589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,714.05 : 388,071.15 = 116,393.10 : x
  2. Step 2: Convert to fraction form
    258,714.05/388,071.15 = 116,393.10/x
  3. Step 3: Cross multiply
    258,714.05x = 388,071.15 × 116,393.10
  4. Step 4: Simplify right side
    258,714.05x = 45,168,805,114.94
  5. Step 5: Solve for x
    x = 45,168,805,114.94/258,714.05
  6. Step 6: Final answer
    x = 174,589.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.