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Finding the Fourth Proportional to 521,609.05, 781,398.37 and 384,582.57

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Solution

The fourth proportional to 521,609.05, 781,398.37 and 384,582.57 is: 576,125.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,609.05 : 781,398.37 = 384,582.57 : x
  2. Step 2: Convert to fraction form
    521,609.05/781,398.37 = 384,582.57/x
  3. Step 3: Cross multiply
    521,609.05x = 781,398.37 × 384,582.57
  4. Step 4: Simplify right side
    521,609.05x = 300,512,193,328.41
  5. Step 5: Solve for x
    x = 300,512,193,328.41/521,609.05
  6. Step 6: Final answer
    x = 576,125.34

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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.