Home / 2,013.45-2,780.67-1,385.60

Finding the Fourth Proportional to 2,013.45, 2,780.67 and 1,385.60

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Solution

The fourth proportional to 2,013.45, 2,780.67 and 1,385.60 is: 1,913.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.45 : 2,780.67 = 1,385.60 : x
  2. Step 2: Convert to fraction form
    2,013.45/2,780.67 = 1,385.60/x
  3. Step 3: Cross multiply
    2,013.45x = 2,780.67 × 1,385.60
  4. Step 4: Simplify right side
    2,013.45x = 3,852,879.85
  5. Step 5: Solve for x
    x = 3,852,879.85/2,013.45
  6. Step 6: Final answer
    x = 1,913.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.