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Finding the Fourth Proportional to 315,374.75, 435,217.00 and 172,134.77

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Solution

The fourth proportional to 315,374.75, 435,217.00 and 172,134.77 is: 237,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,374.75 : 435,217.00 = 172,134.77 : x
  2. Step 2: Convert to fraction form
    315,374.75/435,217.00 = 172,134.77/x
  3. Step 3: Cross multiply
    315,374.75x = 435,217.00 × 172,134.77
  4. Step 4: Simplify right side
    315,374.75x = 74,915,977,334.42
  5. Step 5: Solve for x
    x = 74,915,977,334.42/315,374.75
  6. Step 6: Final answer
    x = 237,545.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.