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Finding the Fourth Proportional to 315,447.45, 435,311.71 and 179,478.42

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Solution

The fourth proportional to 315,447.45, 435,311.71 and 179,478.42 is: 247,676.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,447.45 : 435,311.71 = 179,478.42 : x
  2. Step 2: Convert to fraction form
    315,447.45/435,311.71 = 179,478.42/x
  3. Step 3: Cross multiply
    315,447.45x = 435,311.71 × 179,478.42
  4. Step 4: Simplify right side
    315,447.45x = 78,129,057,918.30
  5. Step 5: Solve for x
    x = 78,129,057,918.30/315,447.45
  6. Step 6: Final answer
    x = 247,676.94

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1.5x scale

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.