Home / 431,623.40-647,435.10-282,324.20

Finding the Fourth Proportional to 431,623.40, 647,435.10 and 282,324.20

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Solution

The fourth proportional to 431,623.40, 647,435.10 and 282,324.20 is: 423,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,623.40 : 647,435.10 = 282,324.20 : x
  2. Step 2: Convert to fraction form
    431,623.40/647,435.10 = 282,324.20/x
  3. Step 3: Cross multiply
    431,623.40x = 647,435.10 × 282,324.20
  4. Step 4: Simplify right side
    431,623.40x = 182,786,596,659.42
  5. Step 5: Solve for x
    x = 182,786,596,659.42/431,623.40
  6. Step 6: Final answer
    x = 423,486.30

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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.