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Finding the Fourth Proportional to 290,000.64, 434,921.76 and 79,588.56

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Solution

The fourth proportional to 290,000.64, 434,921.76 and 79,588.56 is: 119,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,000.64 : 434,921.76 = 79,588.56 : x
  2. Step 2: Convert to fraction form
    290,000.64/434,921.76 = 79,588.56/x
  3. Step 3: Cross multiply
    290,000.64x = 434,921.76 × 79,588.56
  4. Step 4: Simplify right side
    290,000.64x = 34,614,796,591.07
  5. Step 5: Solve for x
    x = 34,614,796,591.07/290,000.64
  6. Step 6: Final answer
    x = 119,361.10

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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.