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Finding the Fourth Proportional to 355,579.80, 533,369.70 and 316,872.60

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Solution

The fourth proportional to 355,579.80, 533,369.70 and 316,872.60 is: 475,308.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,579.80 : 533,369.70 = 316,872.60 : x
  2. Step 2: Convert to fraction form
    355,579.80/533,369.70 = 316,872.60/x
  3. Step 3: Cross multiply
    355,579.80x = 533,369.70 × 316,872.60
  4. Step 4: Simplify right side
    355,579.80x = 169,010,243,600.22
  5. Step 5: Solve for x
    x = 169,010,243,600.22/355,579.80
  6. Step 6: Final answer
    x = 475,308.90

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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.