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Finding the Fourth Proportional to 871,900.80, 1,306,879.20 and 339,244.80

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Solution

The fourth proportional to 871,900.80, 1,306,879.20 and 339,244.80 is: 508,489.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,900.80 : 1,306,879.20 = 339,244.80 : x
  2. Step 2: Convert to fraction form
    871,900.80/1,306,879.20 = 339,244.80/x
  3. Step 3: Cross multiply
    871,900.80x = 1,306,879.20 × 339,244.80
  4. Step 4: Simplify right side
    871,900.80x = 443,351,972,828.16
  5. Step 5: Solve for x
    x = 443,351,972,828.16/871,900.80
  6. Step 6: Final answer
    x = 508,489.01

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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.