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Finding the Fourth Proportional to 320,388.57, 480,205.60 and 130,730.58

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Solution

The fourth proportional to 320,388.57, 480,205.60 and 130,730.58 is: 195,941.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,388.57 : 480,205.60 = 130,730.58 : x
  2. Step 2: Convert to fraction form
    320,388.57/480,205.60 = 130,730.58/x
  3. Step 3: Cross multiply
    320,388.57x = 480,205.60 × 130,730.58
  4. Step 4: Simplify right side
    320,388.57x = 62,777,556,280.42
  5. Step 5: Solve for x
    x = 62,777,556,280.42/320,388.57
  6. Step 6: Final answer
    x = 195,941.93

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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.