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Finding the Fourth Proportional to 439,553.16, 659,868 and 289,918.56

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Solution

The fourth proportional to 439,553.16, 659,868 and 289,918.56 is: 435,232.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,553.16 : 659,868 = 289,918.56 : x
  2. Step 2: Convert to fraction form
    439,553.16/659,868 = 289,918.56/x
  3. Step 3: Cross multiply
    439,553.16x = 659,868 × 289,918.56
  4. Step 4: Simplify right side
    439,553.16x = 191,307,980,350.08
  5. Step 5: Solve for x
    x = 191,307,980,350.08/439,553.16
  6. Step 6: Final answer
    x = 435,232.86

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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.