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Finding the Fourth Proportional to 290,658.88, 435,996.48 and 80,296.80

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Solution

The fourth proportional to 290,658.88, 435,996.48 and 80,296.80 is: 120,447.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,658.88 : 435,996.48 = 80,296.80 : x
  2. Step 2: Convert to fraction form
    290,658.88/435,996.48 = 80,296.80/x
  3. Step 3: Cross multiply
    290,658.88x = 435,996.48 × 80,296.80
  4. Step 4: Simplify right side
    290,658.88x = 35,009,122,155.26
  5. Step 5: Solve for x
    x = 35,009,122,155.26/290,658.88
  6. Step 6: Final answer
    x = 120,447.45

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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.