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Finding the Fourth Proportional to 309,387.66, 426,859.11 and 173,402.73

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Solution

The fourth proportional to 309,387.66, 426,859.11 and 173,402.73 is: 239,242.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,387.66 : 426,859.11 = 173,402.73 : x
  2. Step 2: Convert to fraction form
    309,387.66/426,859.11 = 173,402.73/x
  3. Step 3: Cross multiply
    309,387.66x = 426,859.11 × 173,402.73
  4. Step 4: Simplify right side
    309,387.66x = 74,018,534,999.37
  5. Step 5: Solve for x
    x = 74,018,534,999.37/309,387.66
  6. Step 6: Final answer
    x = 239,242.04

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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.