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Finding the Fourth Proportional to 871,090.12, 1,306,819.86 and 310,123

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Solution

The fourth proportional to 871,090.12, 1,306,819.86 and 310,123 is: 465,250.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,090.12 : 1,306,819.86 = 310,123 : x
  2. Step 2: Convert to fraction form
    871,090.12/1,306,819.86 = 310,123/x
  3. Step 3: Cross multiply
    871,090.12x = 1,306,819.86 × 310,123
  4. Step 4: Simplify right side
    871,090.12x = 405,274,895,442.78
  5. Step 5: Solve for x
    x = 405,274,895,442.78/871,090.12
  6. Step 6: Final answer
    x = 465,250.25

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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.