Home / 1,238,438.20-1,855,907.70-916,074.40

Finding the Fourth Proportional to 1,238,438.20, 1,855,907.70 and 916,074.40

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Solution

The fourth proportional to 1,238,438.20, 1,855,907.70 and 916,074.40 is: 1,372,817.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,438.20 : 1,855,907.70 = 916,074.40 : x
  2. Step 2: Convert to fraction form
    1,238,438.20/1,855,907.70 = 916,074.40/x
  3. Step 3: Cross multiply
    1,238,438.20x = 1,855,907.70 × 916,074.40
  4. Step 4: Simplify right side
    1,238,438.20x = 1,700,149,532,732.88
  5. Step 5: Solve for x
    x = 1,700,149,532,732.88/1,238,438.20
  6. Step 6: Final answer
    x = 1,372,817.42

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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.