Home / 3,110.90-4,666.39-919.66

Finding the Fourth Proportional to 3,110.90, 4,666.39 and 919.66

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Solution

The fourth proportional to 3,110.90, 4,666.39 and 919.66 is: 1,379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.90 : 4,666.39 = 919.66 : x
  2. Step 2: Convert to fraction form
    3,110.90/4,666.39 = 919.66/x
  3. Step 3: Cross multiply
    3,110.90x = 4,666.39 × 919.66
  4. Step 4: Simplify right side
    3,110.90x = 4,291,492.23
  5. Step 5: Solve for x
    x = 4,291,492.23/3,110.90
  6. Step 6: Final answer
    x = 1,379.50

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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.