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Finding the Fourth Proportional to 290,008.20, 434,666.70 and 121,528.20

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Solution

The fourth proportional to 290,008.20, 434,666.70 and 121,528.20 is: 182,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,008.20 : 434,666.70 = 121,528.20 : x
  2. Step 2: Convert to fraction form
    290,008.20/434,666.70 = 121,528.20/x
  3. Step 3: Cross multiply
    290,008.20x = 434,666.70 × 121,528.20
  4. Step 4: Simplify right side
    290,008.20x = 52,824,261,650.94
  5. Step 5: Solve for x
    x = 52,824,261,650.94/290,008.20
  6. Step 6: Final answer
    x = 182,147.48

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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.