Home / 3,109.24-4,664.40-918.10

Finding the Fourth Proportional to 3,109.24, 4,664.40 and 918.10

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Solution

The fourth proportional to 3,109.24, 4,664.40 and 918.10 is: 1,377.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.24 : 4,664.40 = 918.10 : x
  2. Step 2: Convert to fraction form
    3,109.24/4,664.40 = 918.10/x
  3. Step 3: Cross multiply
    3,109.24x = 4,664.40 × 918.10
  4. Step 4: Simplify right side
    3,109.24x = 4,282,385.64
  5. Step 5: Solve for x
    x = 4,282,385.64/3,109.24
  6. Step 6: Final answer
    x = 1,377.31

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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.