Home / 1,280,517.72-1,920,776.64-439,076.76

Finding the Fourth Proportional to 1,280,517.72, 1,920,776.64 and 439,076.76

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Solution

The fourth proportional to 1,280,517.72, 1,920,776.64 and 439,076.76 is: 658,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,517.72 : 1,920,776.64 = 439,076.76 : x
  2. Step 2: Convert to fraction form
    1,280,517.72/1,920,776.64 = 439,076.76/x
  3. Step 3: Cross multiply
    1,280,517.72x = 1,920,776.64 × 439,076.76
  4. Step 4: Simplify right side
    1,280,517.72x = 843,368,383,774.89
  5. Step 5: Solve for x
    x = 843,368,383,774.89/1,280,517.72
  6. Step 6: Final answer
    x = 658,615.16

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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.