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Finding the Fourth Proportional to 283,008.78, 390,516.54 and 191,327.43

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Solution

The fourth proportional to 283,008.78, 390,516.54 and 191,327.43 is: 264,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,008.78 : 390,516.54 = 191,327.43 : x
  2. Step 2: Convert to fraction form
    283,008.78/390,516.54 = 191,327.43/x
  3. Step 3: Cross multiply
    283,008.78x = 390,516.54 × 191,327.43
  4. Step 4: Simplify right side
    283,008.78x = 74,716,525,970.69
  5. Step 5: Solve for x
    x = 74,716,525,970.69/283,008.78
  6. Step 6: Final answer
    x = 264,007.80

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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.