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Finding the Fourth Proportional to 290,337.60, 436,024.80 and 211,540.80

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Solution

The fourth proportional to 290,337.60, 436,024.80 and 211,540.80 is: 317,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,337.60 : 436,024.80 = 211,540.80 : x
  2. Step 2: Convert to fraction form
    290,337.60/436,024.80 = 211,540.80/x
  3. Step 3: Cross multiply
    290,337.60x = 436,024.80 × 211,540.80
  4. Step 4: Simplify right side
    290,337.60x = 92,237,035,011.84
  5. Step 5: Solve for x
    x = 92,237,035,011.84/290,337.60
  6. Step 6: Final answer
    x = 317,688.91

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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.