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Finding the Fourth Proportional to 258,814.80, 357,164.28 and 145,637.64

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Solution

The fourth proportional to 258,814.80, 357,164.28 and 145,637.64 is: 200,979.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,814.80 : 357,164.28 = 145,637.64 : x
  2. Step 2: Convert to fraction form
    258,814.80/357,164.28 = 145,637.64/x
  3. Step 3: Cross multiply
    258,814.80x = 357,164.28 × 145,637.64
  4. Step 4: Simplify right side
    258,814.80x = 52,016,562,831.50
  5. Step 5: Solve for x
    x = 52,016,562,831.50/258,814.80
  6. Step 6: Final answer
    x = 200,979.86

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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.