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Finding the Fourth Proportional to 399,735.56, 551,457.88 and 238,496.86

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Solution

The fourth proportional to 399,735.56, 551,457.88 and 238,496.86 is: 329,019.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,735.56 : 551,457.88 = 238,496.86 : x
  2. Step 2: Convert to fraction form
    399,735.56/551,457.88 = 238,496.86/x
  3. Step 3: Cross multiply
    399,735.56x = 551,457.88 × 238,496.86
  4. Step 4: Simplify right side
    399,735.56x = 131,520,972,802.26
  5. Step 5: Solve for x
    x = 131,520,972,802.26/399,735.56
  6. Step 6: Final answer
    x = 329,019.95

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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.