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Finding the Fourth Proportional to 290,311.72, 435,425.33 and 90,585.64

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Solution

The fourth proportional to 290,311.72, 435,425.33 and 90,585.64 is: 135,865.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,311.72 : 435,425.33 = 90,585.64 : x
  2. Step 2: Convert to fraction form
    290,311.72/435,425.33 = 90,585.64/x
  3. Step 3: Cross multiply
    290,311.72x = 435,425.33 × 90,585.64
  4. Step 4: Simplify right side
    290,311.72x = 39,443,282,190.26
  5. Step 5: Solve for x
    x = 39,443,282,190.26/290,311.72
  6. Step 6: Final answer
    x = 135,865.28

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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.