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Finding the Fourth Proportional to 315,511.02, 435,401.91 and 172,270.62

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Solution

The fourth proportional to 315,511.02, 435,401.91 and 172,270.62 is: 237,731.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,511.02 : 435,401.91 = 172,270.62 : x
  2. Step 2: Convert to fraction form
    315,511.02/435,401.91 = 172,270.62/x
  3. Step 3: Cross multiply
    315,511.02x = 435,401.91 × 172,270.62
  4. Step 4: Simplify right side
    315,511.02x = 75,006,956,984.88
  5. Step 5: Solve for x
    x = 75,006,956,984.88/315,511.02
  6. Step 6: Final answer
    x = 237,731.66

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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.