Home / 858,705.85-1,288,152.20-318,898.81

Finding the Fourth Proportional to 858,705.85, 1,288,152.20 and 318,898.81

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Solution

The fourth proportional to 858,705.85, 1,288,152.20 and 318,898.81 is: 478,382.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,705.85 : 1,288,152.20 = 318,898.81 : x
  2. Step 2: Convert to fraction form
    858,705.85/1,288,152.20 = 318,898.81/x
  3. Step 3: Cross multiply
    858,705.85x = 1,288,152.20 × 318,898.81
  4. Step 4: Simplify right side
    858,705.85x = 410,790,203,678.88
  5. Step 5: Solve for x
    x = 410,790,203,678.88/858,705.85
  6. Step 6: Final answer
    x = 478,382.91

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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.