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Finding the Fourth Proportional to 309,776.75, 427,499.29 and 173,820.76

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Solution

The fourth proportional to 309,776.75, 427,499.29 and 173,820.76 is: 239,876.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,776.75 : 427,499.29 = 173,820.76 : x
  2. Step 2: Convert to fraction form
    309,776.75/427,499.29 = 173,820.76/x
  3. Step 3: Cross multiply
    309,776.75x = 427,499.29 × 173,820.76
  4. Step 4: Simplify right side
    309,776.75x = 74,308,248,480.66
  5. Step 5: Solve for x
    x = 74,308,248,480.66/309,776.75
  6. Step 6: Final answer
    x = 239,876.78

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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.