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Finding the Fourth Proportional to 457,187.40, 685,781.10 and 190,859.40

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Solution

The fourth proportional to 457,187.40, 685,781.10 and 190,859.40 is: 286,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,187.40 : 685,781.10 = 190,859.40 : x
  2. Step 2: Convert to fraction form
    457,187.40/685,781.10 = 190,859.40/x
  3. Step 3: Cross multiply
    457,187.40x = 685,781.10 × 190,859.40
  4. Step 4: Simplify right side
    457,187.40x = 130,887,769,277.34
  5. Step 5: Solve for x
    x = 130,887,769,277.34/457,187.40
  6. Step 6: Final answer
    x = 286,289.10

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Similar ratio
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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.