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Finding the Fourth Proportional to 389,612.40, 584,418.60 and 384,363.60

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Solution

The fourth proportional to 389,612.40, 584,418.60 and 384,363.60 is: 576,545.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,612.40 : 584,418.60 = 384,363.60 : x
  2. Step 2: Convert to fraction form
    389,612.40/584,418.60 = 384,363.60/x
  3. Step 3: Cross multiply
    389,612.40x = 584,418.60 × 384,363.60
  4. Step 4: Simplify right side
    389,612.40x = 224,629,237,002.96
  5. Step 5: Solve for x
    x = 224,629,237,002.96/389,612.40
  6. Step 6: Final answer
    x = 576,545.40

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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.