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Finding the Fourth Proportional to 920,613.77, 1,380,888 and 280,891.67

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Solution

The fourth proportional to 920,613.77, 1,380,888 and 280,891.67 is: 421,327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,613.77 : 1,380,888 = 280,891.67 : x
  2. Step 2: Convert to fraction form
    920,613.77/1,380,888 = 280,891.67/x
  3. Step 3: Cross multiply
    920,613.77x = 1,380,888 × 280,891.67
  4. Step 4: Simplify right side
    920,613.77x = 387,879,936,402.96
  5. Step 5: Solve for x
    x = 387,879,936,402.96/920,613.77
  6. Step 6: Final answer
    x = 421,327.54

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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.