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Finding the Fourth Proportional to 290,646.44, 435,969.08 and 80,283.76

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Solution

The fourth proportional to 290,646.44, 435,969.08 and 80,283.76 is: 120,425.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,646.44 : 435,969.08 = 80,283.76 : x
  2. Step 2: Convert to fraction form
    290,646.44/435,969.08 = 80,283.76/x
  3. Step 3: Cross multiply
    290,646.44x = 435,969.08 × 80,283.76
  4. Step 4: Simplify right side
    290,646.44x = 35,001,236,986.14
  5. Step 5: Solve for x
    x = 35,001,236,986.14/290,646.44
  6. Step 6: Final answer
    x = 120,425.48

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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.