Home / 809,349.70-1,215,008.70-409,784.80

Finding the Fourth Proportional to 809,349.70, 1,215,008.70 and 409,784.80

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Solution

The fourth proportional to 809,349.70, 1,215,008.70 and 409,784.80 is: 615,175.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,349.70 : 1,215,008.70 = 409,784.80 : x
  2. Step 2: Convert to fraction form
    809,349.70/1,215,008.70 = 409,784.80/x
  3. Step 3: Cross multiply
    809,349.70x = 1,215,008.70 × 409,784.80
  4. Step 4: Simplify right side
    809,349.70x = 497,892,097,127.76
  5. Step 5: Solve for x
    x = 497,892,097,127.76/809,349.70
  6. Step 6: Final answer
    x = 615,175.49

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Half scale
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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.