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Finding the Fourth Proportional to 390,537.70, 585,806.58 and 141,161.38

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Solution

The fourth proportional to 390,537.70, 585,806.58 and 141,161.38 is: 211,742.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,537.70 : 585,806.58 = 141,161.38 : x
  2. Step 2: Convert to fraction form
    390,537.70/585,806.58 = 141,161.38/x
  3. Step 3: Cross multiply
    390,537.70x = 585,806.58 × 141,161.38
  4. Step 4: Simplify right side
    390,537.70x = 82,693,265,245.88
  5. Step 5: Solve for x
    x = 82,693,265,245.88/390,537.70
  6. Step 6: Final answer
    x = 211,742.08

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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.