Home / 457,960.10-686,940.15-209,128.10

Finding the Fourth Proportional to 457,960.10, 686,940.15 and 209,128.10

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Solution

The fourth proportional to 457,960.10, 686,940.15 and 209,128.10 is: 313,692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,960.10 : 686,940.15 = 209,128.10 : x
  2. Step 2: Convert to fraction form
    457,960.10/686,940.15 = 209,128.10/x
  3. Step 3: Cross multiply
    457,960.10x = 686,940.15 × 209,128.10
  4. Step 4: Simplify right side
    457,960.10x = 143,658,488,383.22
  5. Step 5: Solve for x
    x = 143,658,488,383.22/457,960.10
  6. Step 6: Final answer
    x = 313,692.15

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Similar ratio
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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.