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Finding the Fourth Proportional to 399,389.64, 551,227.48 and 236,039.16

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Solution

The fourth proportional to 399,389.64, 551,227.48 and 236,039.16 is: 325,775.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,389.64 : 551,227.48 = 236,039.16 : x
  2. Step 2: Convert to fraction form
    399,389.64/551,227.48 = 236,039.16/x
  3. Step 3: Cross multiply
    399,389.64x = 551,227.48 × 236,039.16
  4. Step 4: Simplify right side
    399,389.64x = 130,111,272,825.12
  5. Step 5: Solve for x
    x = 130,111,272,825.12/399,389.64
  6. Step 6: Final answer
    x = 325,775.29

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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.