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Finding the Fourth Proportional to 612,714.80, 919,072.20 and 297,786.80

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Solution

The fourth proportional to 612,714.80, 919,072.20 and 297,786.80 is: 446,680.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,714.80 : 919,072.20 = 297,786.80 : x
  2. Step 2: Convert to fraction form
    612,714.80/919,072.20 = 297,786.80/x
  3. Step 3: Cross multiply
    612,714.80x = 919,072.20 × 297,786.80
  4. Step 4: Simplify right side
    612,714.80x = 273,687,569,406.96
  5. Step 5: Solve for x
    x = 273,687,569,406.96/612,714.80
  6. Step 6: Final answer
    x = 446,680.20

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Double scale
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Similar ratio
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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.