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Finding the Fourth Proportional to 303,605.70, 455,408.55 and 214,959.30

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Solution

The fourth proportional to 303,605.70, 455,408.55 and 214,959.30 is: 322,438.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,605.70 : 455,408.55 = 214,959.30 : x
  2. Step 2: Convert to fraction form
    303,605.70/455,408.55 = 214,959.30/x
  3. Step 3: Cross multiply
    303,605.70x = 455,408.55 × 214,959.30
  4. Step 4: Simplify right side
    303,605.70x = 97,894,303,122.02
  5. Step 5: Solve for x
    x = 97,894,303,122.02/303,605.70
  6. Step 6: Final answer
    x = 322,438.95

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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.