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Finding the Fourth Proportional to 355,479.20, 533,449.20 and 205,719.20

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Solution

The fourth proportional to 355,479.20, 533,449.20 and 205,719.20 is: 308,712.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,479.20 : 533,449.20 = 205,719.20 : x
  2. Step 2: Convert to fraction form
    355,479.20/533,449.20 = 205,719.20/x
  3. Step 3: Cross multiply
    355,479.20x = 533,449.20 × 205,719.20
  4. Step 4: Simplify right side
    355,479.20x = 109,740,742,664.64
  5. Step 5: Solve for x
    x = 109,740,742,664.64/355,479.20
  6. Step 6: Final answer
    x = 308,712.13

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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.