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Finding the Fourth Proportional to 319,081.16, 440,343.05 and 173,899.05

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Solution

The fourth proportional to 319,081.16, 440,343.05 and 173,899.05 is: 239,986.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,081.16 : 440,343.05 = 173,899.05 : x
  2. Step 2: Convert to fraction form
    319,081.16/440,343.05 = 173,899.05/x
  3. Step 3: Cross multiply
    319,081.16x = 440,343.05 × 173,899.05
  4. Step 4: Simplify right side
    319,081.16x = 76,575,237,976.98
  5. Step 5: Solve for x
    x = 76,575,237,976.98/319,081.16
  6. Step 6: Final answer
    x = 239,986.71

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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.