Home / 856,855.10-1,285,023.58-257,657.20

Finding the Fourth Proportional to 856,855.10, 1,285,023.58 and 257,657.20

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Solution

The fourth proportional to 856,855.10, 1,285,023.58 and 257,657.20 is: 386,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,855.10 : 1,285,023.58 = 257,657.20 : x
  2. Step 2: Convert to fraction form
    856,855.10/1,285,023.58 = 257,657.20/x
  3. Step 3: Cross multiply
    856,855.10x = 1,285,023.58 × 257,657.20
  4. Step 4: Simplify right side
    856,855.10x = 331,095,577,556.78
  5. Step 5: Solve for x
    x = 331,095,577,556.78/856,855.10
  6. Step 6: Final answer
    x = 386,407.90

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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.