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Finding the Fourth Proportional to 290,323.22, 435,484.67 and 90,660.72

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Solution

The fourth proportional to 290,323.22, 435,484.67 and 90,660.72 is: 135,991.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,323.22 : 435,484.67 = 90,660.72 : x
  2. Step 2: Convert to fraction form
    290,323.22/435,484.67 = 90,660.72/x
  3. Step 3: Cross multiply
    290,323.22x = 435,484.67 × 90,660.72
  4. Step 4: Simplify right side
    290,323.22x = 39,481,352,588.82
  5. Step 5: Solve for x
    x = 39,481,352,588.82/290,323.22
  6. Step 6: Final answer
    x = 135,991.02

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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.