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Finding the Fourth Proportional to 259,730.60, 389,595.90 and 256,231.40

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Solution

The fourth proportional to 259,730.60, 389,595.90 and 256,231.40 is: 384,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,730.60 : 389,595.90 = 256,231.40 : x
  2. Step 2: Convert to fraction form
    259,730.60/389,595.90 = 256,231.40/x
  3. Step 3: Cross multiply
    259,730.60x = 389,595.90 × 256,231.40
  4. Step 4: Simplify right side
    259,730.60x = 99,826,702,891.26
  5. Step 5: Solve for x
    x = 99,826,702,891.26/259,730.60
  6. Step 6: Final answer
    x = 384,347.10

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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.