Home / 385,171.88-531,535.38-215,406.68

Finding the Fourth Proportional to 385,171.88, 531,535.38 and 215,406.68

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Solution

The fourth proportional to 385,171.88, 531,535.38 and 215,406.68 is: 297,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,171.88 : 531,535.38 = 215,406.68 : x
  2. Step 2: Convert to fraction form
    385,171.88/531,535.38 = 215,406.68/x
  3. Step 3: Cross multiply
    385,171.88x = 531,535.38 × 215,406.68
  4. Step 4: Simplify right side
    385,171.88x = 114,496,271,508.34
  5. Step 5: Solve for x
    x = 114,496,271,508.34/385,171.88
  6. Step 6: Final answer
    x = 297,260.20

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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.