Home / 457,966.10-686,949.15-209,134.10

Finding the Fourth Proportional to 457,966.10, 686,949.15 and 209,134.10

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Solution

The fourth proportional to 457,966.10, 686,949.15 and 209,134.10 is: 313,701.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,966.10 : 686,949.15 = 209,134.10 : x
  2. Step 2: Convert to fraction form
    457,966.10/686,949.15 = 209,134.10/x
  3. Step 3: Cross multiply
    457,966.10x = 686,949.15 × 209,134.10
  4. Step 4: Simplify right side
    457,966.10x = 143,664,492,231.02
  5. Step 5: Solve for x
    x = 143,664,492,231.02/457,966.10
  6. Step 6: Final answer
    x = 313,701.15

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Double scale
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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.