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Finding the Fourth Proportional to 245,304.50, 338,503.38 and 137,890.70

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Solution

The fourth proportional to 245,304.50, 338,503.38 and 137,890.70 is: 190,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,304.50 : 338,503.38 = 137,890.70 : x
  2. Step 2: Convert to fraction form
    245,304.50/338,503.38 = 137,890.70/x
  3. Step 3: Cross multiply
    245,304.50x = 338,503.38 × 137,890.70
  4. Step 4: Simplify right side
    245,304.50x = 46,676,468,020.57
  5. Step 5: Solve for x
    x = 46,676,468,020.57/245,304.50
  6. Step 6: Final answer
    x = 190,279.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.