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Finding the Fourth Proportional to 290,360.80, 435,528.96 and 90,679.60

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Solution

The fourth proportional to 290,360.80, 435,528.96 and 90,679.60 is: 136,015.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,360.80 : 435,528.96 = 90,679.60 : x
  2. Step 2: Convert to fraction form
    290,360.80/435,528.96 = 90,679.60/x
  3. Step 3: Cross multiply
    290,360.80x = 435,528.96 × 90,679.60
  4. Step 4: Simplify right side
    290,360.80x = 39,493,591,881.22
  5. Step 5: Solve for x
    x = 39,493,591,881.22/290,360.80
  6. Step 6: Final answer
    x = 136,015.58

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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.