Home / 858,704.85-1,288,150.70-318,897.81

Finding the Fourth Proportional to 858,704.85, 1,288,150.70 and 318,897.81

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Solution

The fourth proportional to 858,704.85, 1,288,150.70 and 318,897.81 is: 478,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,704.85 : 1,288,150.70 = 318,897.81 : x
  2. Step 2: Convert to fraction form
    858,704.85/1,288,150.70 = 318,897.81/x
  3. Step 3: Cross multiply
    858,704.85x = 1,288,150.70 × 318,897.81
  4. Step 4: Simplify right side
    858,704.85x = 410,788,437,179.97
  5. Step 5: Solve for x
    x = 410,788,437,179.97/858,704.85
  6. Step 6: Final answer
    x = 478,381.41

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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.