Home / 285,279.03-393,689.90-156,215.43

Finding the Fourth Proportional to 285,279.03, 393,689.90 and 156,215.43

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Solution

The fourth proportional to 285,279.03, 393,689.90 and 156,215.43 is: 215,579.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,279.03 : 393,689.90 = 156,215.43 : x
  2. Step 2: Convert to fraction form
    285,279.03/393,689.90 = 156,215.43/x
  3. Step 3: Cross multiply
    285,279.03x = 393,689.90 × 156,215.43
  4. Step 4: Simplify right side
    285,279.03x = 61,500,436,234.08
  5. Step 5: Solve for x
    x = 61,500,436,234.08/285,279.03
  6. Step 6: Final answer
    x = 215,579.94

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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.