Home / 1,278,000.15-1,917,000.23-379,580.55

Finding the Fourth Proportional to 1,278,000.15, 1,917,000.23 and 379,580.55

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Solution

The fourth proportional to 1,278,000.15, 1,917,000.23 and 379,580.55 is: 569,370.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,000.15 : 1,917,000.23 = 379,580.55 : x
  2. Step 2: Convert to fraction form
    1,278,000.15/1,917,000.23 = 379,580.55/x
  3. Step 3: Cross multiply
    1,278,000.15x = 1,917,000.23 × 379,580.55
  4. Step 4: Simplify right side
    1,278,000.15x = 727,655,999,755.62
  5. Step 5: Solve for x
    x = 727,655,999,755.62/1,278,000.15
  6. Step 6: Final answer
    x = 569,370.83

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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.