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Finding the Fourth Proportional to 390,887.98, 585,339.62 and 327,541.52

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Solution

The fourth proportional to 390,887.98, 585,339.62 and 327,541.52 is: 490,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,887.98 : 585,339.62 = 327,541.52 : x
  2. Step 2: Convert to fraction form
    390,887.98/585,339.62 = 327,541.52/x
  3. Step 3: Cross multiply
    390,887.98x = 585,339.62 × 327,541.52
  4. Step 4: Simplify right side
    390,887.98x = 191,723,028,676.66
  5. Step 5: Solve for x
    x = 191,723,028,676.66/390,887.98
  6. Step 6: Final answer
    x = 490,480.75

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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.