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Finding the Fourth Proportional to 810,119.20, 1,215,178.80 and 573,728.80

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Solution

The fourth proportional to 810,119.20, 1,215,178.80 and 573,728.80 is: 860,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,119.20 : 1,215,178.80 = 573,728.80 : x
  2. Step 2: Convert to fraction form
    810,119.20/1,215,178.80 = 573,728.80/x
  3. Step 3: Cross multiply
    810,119.20x = 1,215,178.80 × 573,728.80
  4. Step 4: Simplify right side
    810,119.20x = 697,183,074,709.44
  5. Step 5: Solve for x
    x = 697,183,074,709.44/810,119.20
  6. Step 6: Final answer
    x = 860,593.20

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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.