Home / 2,980.86-4,110.72-1,785.65

Finding the Fourth Proportional to 2,980.86, 4,110.72 and 1,785.65

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Solution

The fourth proportional to 2,980.86, 4,110.72 and 1,785.65 is: 2,462.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.86 : 4,110.72 = 1,785.65 : x
  2. Step 2: Convert to fraction form
    2,980.86/4,110.72 = 1,785.65/x
  3. Step 3: Cross multiply
    2,980.86x = 4,110.72 × 1,785.65
  4. Step 4: Simplify right side
    2,980.86x = 7,340,307.17
  5. Step 5: Solve for x
    x = 7,340,307.17/2,980.86
  6. Step 6: Final answer
    x = 2,462.48

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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.