Home / 920,609.50-1,380,931.54-255,778.78

Finding the Fourth Proportional to 920,609.50, 1,380,931.54 and 255,778.78

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Solution

The fourth proportional to 920,609.50, 1,380,931.54 and 255,778.78 is: 383,672.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,609.50 : 1,380,931.54 = 255,778.78 : x
  2. Step 2: Convert to fraction form
    920,609.50/1,380,931.54 = 255,778.78/x
  3. Step 3: Cross multiply
    920,609.50x = 1,380,931.54 × 255,778.78
  4. Step 4: Simplify right side
    920,609.50x = 353,212,984,564.72
  5. Step 5: Solve for x
    x = 353,212,984,564.72/920,609.50
  6. Step 6: Final answer
    x = 383,672.97

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1.5x scale

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.