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Finding the Fourth Proportional to 390,901, 585,359.10 and 327,554.54

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Solution

The fourth proportional to 390,901, 585,359.10 and 327,554.54 is: 490,500.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,901 : 585,359.10 = 327,554.54 : x
  2. Step 2: Convert to fraction form
    390,901/585,359.10 = 327,554.54/x
  3. Step 3: Cross multiply
    390,901x = 585,359.10 × 327,554.54
  4. Step 4: Simplify right side
    390,901x = 191,737,030,735.31
  5. Step 5: Solve for x
    x = 191,737,030,735.31/390,901
  6. Step 6: Final answer
    x = 490,500.23

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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.