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Finding the Fourth Proportional to 290,743.20, 436,244.40 and 132,890.40

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Solution

The fourth proportional to 290,743.20, 436,244.40 and 132,890.40 is: 199,394.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,743.20 : 436,244.40 = 132,890.40 : x
  2. Step 2: Convert to fraction form
    290,743.20/436,244.40 = 132,890.40/x
  3. Step 3: Cross multiply
    290,743.20x = 436,244.40 × 132,890.40
  4. Step 4: Simplify right side
    290,743.20x = 57,972,692,813.76
  5. Step 5: Solve for x
    x = 57,972,692,813.76/290,743.20
  6. Step 6: Final answer
    x = 199,394.84

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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.