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Finding the Fourth Proportional to 436,894.20, 655,341.30 and 394,903.80

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Solution

The fourth proportional to 436,894.20, 655,341.30 and 394,903.80 is: 592,355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,894.20 : 655,341.30 = 394,903.80 : x
  2. Step 2: Convert to fraction form
    436,894.20/655,341.30 = 394,903.80/x
  3. Step 3: Cross multiply
    436,894.20x = 655,341.30 × 394,903.80
  4. Step 4: Simplify right side
    436,894.20x = 258,796,769,666.94
  5. Step 5: Solve for x
    x = 258,796,769,666.94/436,894.20
  6. Step 6: Final answer
    x = 592,355.70

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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.