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Finding the Fourth Proportional to 368,388.91, 552,581.54 and 318,316.63

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Solution

The fourth proportional to 368,388.91, 552,581.54 and 318,316.63 is: 477,473.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,388.91 : 552,581.54 = 318,316.63 : x
  2. Step 2: Convert to fraction form
    368,388.91/552,581.54 = 318,316.63/x
  3. Step 3: Cross multiply
    368,388.91x = 552,581.54 × 318,316.63
  4. Step 4: Simplify right side
    368,388.91x = 175,895,892,021.43
  5. Step 5: Solve for x
    x = 175,895,892,021.43/368,388.91
  6. Step 6: Final answer
    x = 477,473.37

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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.