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Finding the Fourth Proportional to 390,609.59, 585,910.21 and 296,418.39

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Solution

The fourth proportional to 390,609.59, 585,910.21 and 296,418.39 is: 444,624.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,609.59 : 585,910.21 = 296,418.39 : x
  2. Step 2: Convert to fraction form
    390,609.59/585,910.21 = 296,418.39/x
  3. Step 3: Cross multiply
    390,609.59x = 585,910.21 × 296,418.39
  4. Step 4: Simplify right side
    390,609.59x = 173,674,558,750.34
  5. Step 5: Solve for x
    x = 173,674,558,750.34/390,609.59
  6. Step 6: Final answer
    x = 444,624.41

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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.