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Finding the Fourth Proportional to 871,381.80, 1,307,072.70 and 310,434.60

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Solution

The fourth proportional to 871,381.80, 1,307,072.70 and 310,434.60 is: 465,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,381.80 : 1,307,072.70 = 310,434.60 : x
  2. Step 2: Convert to fraction form
    871,381.80/1,307,072.70 = 310,434.60/x
  3. Step 3: Cross multiply
    871,381.80x = 1,307,072.70 × 310,434.60
  4. Step 4: Simplify right side
    871,381.80x = 405,760,590,795.42
  5. Step 5: Solve for x
    x = 405,760,590,795.42/871,381.80
  6. Step 6: Final answer
    x = 465,651.90

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Similar ratio
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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.