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Finding the Fourth Proportional to 289,212.17, 399,116.90 and 166,636.94

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Solution

The fourth proportional to 289,212.17, 399,116.90 and 166,636.94 is: 229,961.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,212.17 : 399,116.90 = 166,636.94 : x
  2. Step 2: Convert to fraction form
    289,212.17/399,116.90 = 166,636.94/x
  3. Step 3: Cross multiply
    289,212.17x = 399,116.90 × 166,636.94
  4. Step 4: Simplify right side
    289,212.17x = 66,507,618,085.10
  5. Step 5: Solve for x
    x = 66,507,618,085.10/289,212.17
  6. Step 6: Final answer
    x = 229,961.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.