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Finding the Fourth Proportional to 315,676.08, 435,625.74 and 172,436.76

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Solution

The fourth proportional to 315,676.08, 435,625.74 and 172,436.76 is: 237,958.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,676.08 : 435,625.74 = 172,436.76 : x
  2. Step 2: Convert to fraction form
    315,676.08/435,625.74 = 172,436.76/x
  3. Step 3: Cross multiply
    315,676.08x = 435,625.74 × 172,436.76
  4. Step 4: Simplify right side
    315,676.08x = 75,117,891,178.20
  5. Step 5: Solve for x
    x = 75,117,891,178.20/315,676.08
  6. Step 6: Final answer
    x = 237,958.77

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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.