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Finding the Fourth Proportional to 289,396.40, 399,372.53 and 162,071.69

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Solution

The fourth proportional to 289,396.40, 399,372.53 and 162,071.69 is: 223,662.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,396.40 : 399,372.53 = 162,071.69 : x
  2. Step 2: Convert to fraction form
    289,396.40/399,372.53 = 162,071.69/x
  3. Step 3: Cross multiply
    289,396.40x = 399,372.53 × 162,071.69
  4. Step 4: Simplify right side
    289,396.40x = 64,726,978,069.45
  5. Step 5: Solve for x
    x = 64,726,978,069.45/289,396.40
  6. Step 6: Final answer
    x = 223,662.01

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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.