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Finding the Fourth Proportional to 446,999.40, 670,434.30 and 131,423.40

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Solution

The fourth proportional to 446,999.40, 670,434.30 and 131,423.40 is: 197,116.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    446,999.40 : 670,434.30 = 131,423.40 : x
  2. Step 2: Convert to fraction form
    446,999.40/670,434.30 = 131,423.40/x
  3. Step 3: Cross multiply
    446,999.40x = 670,434.30 × 131,423.40
  4. Step 4: Simplify right side
    446,999.40x = 88,110,755,182.62
  5. Step 5: Solve for x
    x = 88,110,755,182.62/446,999.40
  6. Step 6: Final answer
    x = 197,116.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.