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Finding the Fourth Proportional to 290,197.80, 435,329.10 and 90,516.60

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Solution

The fourth proportional to 290,197.80, 435,329.10 and 90,516.60 is: 135,785.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,197.80 : 435,329.10 = 90,516.60 : x
  2. Step 2: Convert to fraction form
    290,197.80/435,329.10 = 90,516.60/x
  3. Step 3: Cross multiply
    290,197.80x = 435,329.10 × 90,516.60
  4. Step 4: Simplify right side
    290,197.80x = 39,404,510,013.06
  5. Step 5: Solve for x
    x = 39,404,510,013.06/290,197.80
  6. Step 6: Final answer
    x = 135,785.01

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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.