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Finding the Fourth Proportional to 290,246.18, 435,493.20 and 121,808.30

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Solution

The fourth proportional to 290,246.18, 435,493.20 and 121,808.30 is: 182,764.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,246.18 : 435,493.20 = 121,808.30 : x
  2. Step 2: Convert to fraction form
    290,246.18/435,493.20 = 121,808.30/x
  3. Step 3: Cross multiply
    290,246.18x = 435,493.20 × 121,808.30
  4. Step 4: Simplify right side
    290,246.18x = 53,046,686,353.56
  5. Step 5: Solve for x
    x = 53,046,686,353.56/290,246.18
  6. Step 6: Final answer
    x = 182,764.46

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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.