Home / 642,640.23-886,606.16-384,523.20

Finding the Fourth Proportional to 642,640.23, 886,606.16 and 384,523.20

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Solution

The fourth proportional to 642,640.23, 886,606.16 and 384,523.20 is: 530,499.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,640.23 : 886,606.16 = 384,523.20 : x
  2. Step 2: Convert to fraction form
    642,640.23/886,606.16 = 384,523.20/x
  3. Step 3: Cross multiply
    642,640.23x = 886,606.16 × 384,523.20
  4. Step 4: Simplify right side
    642,640.23x = 340,920,635,860.30
  5. Step 5: Solve for x
    x = 340,920,635,860.30/642,640.23
  6. Step 6: Final answer
    x = 530,499.99

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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.