Home / 856,395.35-1,284,879.80-280,045.20

Finding the Fourth Proportional to 856,395.35, 1,284,879.80 and 280,045.20

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Solution

The fourth proportional to 856,395.35, 1,284,879.80 and 280,045.20 is: 420,161.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,395.35 : 1,284,879.80 = 280,045.20 : x
  2. Step 2: Convert to fraction form
    856,395.35/1,284,879.80 = 280,045.20/x
  3. Step 3: Cross multiply
    856,395.35x = 1,284,879.80 × 280,045.20
  4. Step 4: Simplify right side
    856,395.35x = 359,824,420,566.96
  5. Step 5: Solve for x
    x = 359,824,420,566.96/856,395.35
  6. Step 6: Final answer
    x = 420,161.58

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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.