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Finding the Fourth Proportional to 693,486.60, 1,040,429.16 and 288,600

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Solution

The fourth proportional to 693,486.60, 1,040,429.16 and 288,600 is: 432,982.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,486.60 : 1,040,429.16 = 288,600 : x
  2. Step 2: Convert to fraction form
    693,486.60/1,040,429.16 = 288,600/x
  3. Step 3: Cross multiply
    693,486.60x = 1,040,429.16 × 288,600
  4. Step 4: Simplify right side
    693,486.60x = 300,267,855,576
  5. Step 5: Solve for x
    x = 300,267,855,576/693,486.60
  6. Step 6: Final answer
    x = 432,982.92

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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.