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Finding the Fourth Proportional to 290,325.12, 435,487.52 and 90,662.62

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Solution

The fourth proportional to 290,325.12, 435,487.52 and 90,662.62 is: 135,993.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,325.12 : 435,487.52 = 90,662.62 : x
  2. Step 2: Convert to fraction form
    290,325.12/435,487.52 = 90,662.62/x
  3. Step 3: Cross multiply
    290,325.12x = 435,487.52 × 90,662.62
  4. Step 4: Simplify right side
    290,325.12x = 39,482,437,887.69
  5. Step 5: Solve for x
    x = 39,482,437,887.69/290,325.12
  6. Step 6: Final answer
    x = 135,993.87

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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.