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Finding the Fourth Proportional to 285,391.20, 393,818.18 and 158,064.06

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Solution

The fourth proportional to 285,391.20, 393,818.18 and 158,064.06 is: 218,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,391.20 : 393,818.18 = 158,064.06 : x
  2. Step 2: Convert to fraction form
    285,391.20/393,818.18 = 158,064.06/x
  3. Step 3: Cross multiply
    285,391.20x = 393,818.18 × 158,064.06
  4. Step 4: Simplify right side
    285,391.20x = 62,248,499,348.44
  5. Step 5: Solve for x
    x = 62,248,499,348.44/285,391.20
  6. Step 6: Final answer
    x = 218,116.40

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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.