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Finding the Fourth Proportional to 315,456.90, 435,337.11 and 172,222.98

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Solution

The fourth proportional to 315,456.90, 435,337.11 and 172,222.98 is: 237,671.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,456.90 : 435,337.11 = 172,222.98 : x
  2. Step 2: Convert to fraction form
    315,456.90/435,337.11 = 172,222.98/x
  3. Step 3: Cross multiply
    315,456.90x = 435,337.11 × 172,222.98
  4. Step 4: Simplify right side
    315,456.90x = 74,975,054,388.79
  5. Step 5: Solve for x
    x = 74,975,054,388.79/315,456.90
  6. Step 6: Final answer
    x = 237,671.31

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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.