Home / 919,389.38-1,379,090.21-320,361.98

Finding the Fourth Proportional to 919,389.38, 1,379,090.21 and 320,361.98

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Solution

The fourth proportional to 919,389.38, 1,379,090.21 and 320,361.98 is: 480,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,389.38 : 1,379,090.21 = 320,361.98 : x
  2. Step 2: Convert to fraction form
    919,389.38/1,379,090.21 = 320,361.98/x
  3. Step 3: Cross multiply
    919,389.38x = 1,379,090.21 × 320,361.98
  4. Step 4: Simplify right side
    919,389.38x = 441,808,061,776.96
  5. Step 5: Solve for x
    x = 441,808,061,776.96/919,389.38
  6. Step 6: Final answer
    x = 480,545.10

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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.