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Finding the Fourth Proportional to 399,028.36, 598,543.22 and 319,571.68

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Solution

The fourth proportional to 399,028.36, 598,543.22 and 319,571.68 is: 479,358.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,028.36 : 598,543.22 = 319,571.68 : x
  2. Step 2: Convert to fraction form
    399,028.36/598,543.22 = 319,571.68/x
  3. Step 3: Cross multiply
    399,028.36x = 598,543.22 × 319,571.68
  4. Step 4: Simplify right side
    399,028.36x = 191,277,462,368.01
  5. Step 5: Solve for x
    x = 191,277,462,368.01/399,028.36
  6. Step 6: Final answer
    x = 479,358.06

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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.