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Finding the Fourth Proportional to 339,474.60, 509,211.90 and 213,503.40

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Solution

The fourth proportional to 339,474.60, 509,211.90 and 213,503.40 is: 320,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,474.60 : 509,211.90 = 213,503.40 : x
  2. Step 2: Convert to fraction form
    339,474.60/509,211.90 = 213,503.40/x
  3. Step 3: Cross multiply
    339,474.60x = 509,211.90 × 213,503.40
  4. Step 4: Simplify right side
    339,474.60x = 108,718,471,970.46
  5. Step 5: Solve for x
    x = 108,718,471,970.46/339,474.60
  6. Step 6: Final answer
    x = 320,255.10

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1.5x scale

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.