Home / 856,403.25-1,284,555.47-257,351.55

Finding the Fourth Proportional to 856,403.25, 1,284,555.47 and 257,351.55

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Solution

The fourth proportional to 856,403.25, 1,284,555.47 and 257,351.55 is: 386,012.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,403.25 : 1,284,555.47 = 257,351.55 : x
  2. Step 2: Convert to fraction form
    856,403.25/1,284,555.47 = 257,351.55/x
  3. Step 3: Cross multiply
    856,403.25x = 1,284,555.47 × 257,351.55
  4. Step 4: Simplify right side
    856,403.25x = 330,582,339,978.72
  5. Step 5: Solve for x
    x = 330,582,339,978.72/856,403.25
  6. Step 6: Final answer
    x = 386,012.48

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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.