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Finding the Fourth Proportional to 389,569.80, 584,354.70 and 342,913.80

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Solution

The fourth proportional to 389,569.80, 584,354.70 and 342,913.80 is: 514,370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,569.80 : 584,354.70 = 342,913.80 : x
  2. Step 2: Convert to fraction form
    389,569.80/584,354.70 = 342,913.80/x
  3. Step 3: Cross multiply
    389,569.80x = 584,354.70 × 342,913.80
  4. Step 4: Simplify right side
    389,569.80x = 200,383,290,724.86
  5. Step 5: Solve for x
    x = 200,383,290,724.86/389,569.80
  6. Step 6: Final answer
    x = 514,370.70

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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.