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Finding the Fourth Proportional to 290,164.20, 434,900.70 and 121,684.20

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Solution

The fourth proportional to 290,164.20, 434,900.70 and 121,684.20 is: 182,381.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,164.20 : 434,900.70 = 121,684.20 : x
  2. Step 2: Convert to fraction form
    290,164.20/434,900.70 = 121,684.20/x
  3. Step 3: Cross multiply
    290,164.20x = 434,900.70 × 121,684.20
  4. Step 4: Simplify right side
    290,164.20x = 52,920,543,758.94
  5. Step 5: Solve for x
    x = 52,920,543,758.94/290,164.20
  6. Step 6: Final answer
    x = 182,381.37

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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.