Home / 1,214.10-1,674.82-918.86

Finding the Fourth Proportional to 1,214.10, 1,674.82 and 918.86

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Solution

The fourth proportional to 1,214.10, 1,674.82 and 918.86 is: 1,267.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.10 : 1,674.82 = 918.86 : x
  2. Step 2: Convert to fraction form
    1,214.10/1,674.82 = 918.86/x
  3. Step 3: Cross multiply
    1,214.10x = 1,674.82 × 918.86
  4. Step 4: Simplify right side
    1,214.10x = 1,538,917.88
  5. Step 5: Solve for x
    x = 1,538,917.88/1,214.10
  6. Step 6: Final answer
    x = 1,267.54

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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.